| 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 | |
| 35 | static 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 | |
| 65 | static 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 | |
| 96 | static 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 | |
| 119 | static 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 | |
| 142 | static void wmv2_mspel8_h_lowpass(uint8_t *dst, const 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 | |
| 162 | static void wmv2_mspel8_v_lowpass(uint8_t *dst, const 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 | |
| 193 | static void put_mspel8_mc10_c(uint8_t *dst, const 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 | |
| 201 | static void put_mspel8_mc20_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride) |
| 202 | { |
| 203 | wmv2_mspel8_h_lowpass(dst, src, stride, stride, 8); |
| 204 | } |
| 205 | |
| 206 | static void put_mspel8_mc30_c(uint8_t *dst, const 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 | |
| 214 | static void put_mspel8_mc02_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride) |
| 215 | { |
| 216 | wmv2_mspel8_v_lowpass(dst, src, stride, stride, 8); |
| 217 | } |
| 218 | |
| 219 | static void put_mspel8_mc12_c(uint8_t *dst, const 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 | |
| 231 | static void put_mspel8_mc32_c(uint8_t *dst, const 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 | |
| 243 | static void put_mspel8_mc22_c(uint8_t *dst, const 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 | |
| 251 | av_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_IDCT_PERM_NONE; |
| 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 | } |