ffmpeg / libavcodec / vp3dsp.c @ 5509bffa
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| 1 | 44cb64ee | Mike Melanson | /*
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| 2 | * Copyright (C) 2004 the ffmpeg project
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| 3 | *
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| 4 | * This library is free software; you can redistribute it and/or
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| 5 | * modify it under the terms of the GNU Lesser General Public
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| 6 | * License as published by the Free Software Foundation; either
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| 7 | * version 2 of the License, or (at your option) any later version.
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| 8 | *
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| 9 | * This library is distributed in the hope that it will be useful,
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | * Lesser General Public License for more details.
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| 13 | *
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| 14 | * You should have received a copy of the GNU Lesser General Public
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| 15 | * License along with this library; if not, write to the Free Software
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| 16 | 5509bffa | Diego Biurrun | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 | 44cb64ee | Mike Melanson | */
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| 18 | |||
| 19 | /**
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| 20 | * @file vp3dsp.c
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| 21 | 115329f1 | Diego Biurrun | * Standard C DSP-oriented functions cribbed from the original VP3
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| 22 | 44cb64ee | Mike Melanson | * source code.
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| 23 | */
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| 24 | |||
| 25 | #include "common.h" |
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| 26 | #include "avcodec.h" |
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| 27 | e96682e6 | Michael Niedermayer | #include "dsputil.h" |
| 28 | 44cb64ee | Mike Melanson | |
| 29 | #define IdctAdjustBeforeShift 8 |
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| 30 | #define xC1S7 64277 |
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| 31 | #define xC2S6 60547 |
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| 32 | #define xC3S5 54491 |
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| 33 | #define xC4S4 46341 |
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| 34 | #define xC5S3 36410 |
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| 35 | #define xC6S2 25080 |
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| 36 | #define xC7S1 12785 |
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| 37 | |||
| 38 | 8b6103da | Michael Niedermayer | static always_inline void idct(uint8_t *dst, int stride, int16_t *input, int type) |
| 39 | 44cb64ee | Mike Melanson | {
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| 40 | 8b6103da | Michael Niedermayer | int16_t *ip = input; |
| 41 | uint8_t *cm = cropTbl + MAX_NEG_CROP; |
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| 42 | 44cb64ee | Mike Melanson | |
| 43 | 8b6103da | Michael Niedermayer | int A_, B_, C_, D_, _Ad, _Bd, _Cd, _Dd, E_, F_, G_, H_;
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| 44 | int _Ed, _Gd, _Add, _Bdd, _Fd, _Hd;
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| 45 | int t1, t2;
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| 46 | 44cb64ee | Mike Melanson | |
| 47 | bf4e3bd2 | Måns Rullgård | int i;
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| 48 | 115329f1 | Diego Biurrun | |
| 49 | 44cb64ee | Mike Melanson | /* Inverse DCT on the rows now */
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| 50 | for (i = 0; i < 8; i++) { |
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| 51 | /* Check for non-zero values */
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| 52 | if ( ip[0] | ip[1] | ip[2] | ip[3] | ip[4] | ip[5] | ip[6] | ip[7] ) { |
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| 53 | t1 = (int32_t)(xC1S7 * ip[1]);
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| 54 | t2 = (int32_t)(xC7S1 * ip[7]);
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| 55 | t1 >>= 16;
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| 56 | t2 >>= 16;
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| 57 | A_ = t1 + t2; |
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| 58 | |||
| 59 | t1 = (int32_t)(xC7S1 * ip[1]);
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| 60 | t2 = (int32_t)(xC1S7 * ip[7]);
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| 61 | t1 >>= 16;
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| 62 | t2 >>= 16;
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| 63 | B_ = t1 - t2; |
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| 64 | |||
| 65 | t1 = (int32_t)(xC3S5 * ip[3]);
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| 66 | t2 = (int32_t)(xC5S3 * ip[5]);
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| 67 | t1 >>= 16;
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| 68 | t2 >>= 16;
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| 69 | C_ = t1 + t2; |
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| 70 | |||
| 71 | t1 = (int32_t)(xC3S5 * ip[5]);
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| 72 | t2 = (int32_t)(xC5S3 * ip[3]);
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| 73 | t1 >>= 16;
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| 74 | t2 >>= 16;
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| 75 | D_ = t1 - t2; |
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| 76 | |||
| 77 | |||
| 78 | t1 = (int32_t)(xC4S4 * (A_ - C_)); |
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| 79 | t1 >>= 16;
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| 80 | _Ad = t1; |
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| 81 | |||
| 82 | t1 = (int32_t)(xC4S4 * (B_ - D_)); |
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| 83 | t1 >>= 16;
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| 84 | _Bd = t1; |
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| 85 | |||
| 86 | |||
| 87 | _Cd = A_ + C_; |
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| 88 | _Dd = B_ + D_; |
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| 89 | |||
| 90 | t1 = (int32_t)(xC4S4 * (ip[0] + ip[4])); |
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| 91 | t1 >>= 16;
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| 92 | E_ = t1; |
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| 93 | |||
| 94 | t1 = (int32_t)(xC4S4 * (ip[0] - ip[4])); |
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| 95 | t1 >>= 16;
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| 96 | F_ = t1; |
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| 97 | |||
| 98 | t1 = (int32_t)(xC2S6 * ip[2]);
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| 99 | t2 = (int32_t)(xC6S2 * ip[6]);
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| 100 | t1 >>= 16;
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| 101 | t2 >>= 16;
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| 102 | G_ = t1 + t2; |
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| 103 | |||
| 104 | t1 = (int32_t)(xC6S2 * ip[2]);
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| 105 | t2 = (int32_t)(xC2S6 * ip[6]);
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| 106 | t1 >>= 16;
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| 107 | t2 >>= 16;
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| 108 | H_ = t1 - t2; |
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| 109 | |||
| 110 | |||
| 111 | _Ed = E_ - G_; |
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| 112 | _Gd = E_ + G_; |
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| 113 | |||
| 114 | _Add = F_ + _Ad; |
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| 115 | _Bdd = _Bd - H_; |
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| 116 | |||
| 117 | _Fd = F_ - _Ad; |
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| 118 | _Hd = _Bd + H_; |
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| 119 | |||
| 120 | /* Final sequence of operations over-write original inputs. */
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| 121 | 8b6103da | Michael Niedermayer | ip[0] = _Gd + _Cd ;
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| 122 | ip[7] = _Gd - _Cd ;
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| 123 | 44cb64ee | Mike Melanson | |
| 124 | 8b6103da | Michael Niedermayer | ip[1] = _Add + _Hd;
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| 125 | ip[2] = _Add - _Hd;
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| 126 | 44cb64ee | Mike Melanson | |
| 127 | 8b6103da | Michael Niedermayer | ip[3] = _Ed + _Dd ;
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| 128 | ip[4] = _Ed - _Dd ;
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| 129 | 44cb64ee | Mike Melanson | |
| 130 | 8b6103da | Michael Niedermayer | ip[5] = _Fd + _Bdd;
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| 131 | ip[6] = _Fd - _Bdd;
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| 132 | 44cb64ee | Mike Melanson | |
| 133 | } |
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| 134 | |||
| 135 | ip += 8; /* next row */ |
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| 136 | } |
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| 137 | 115329f1 | Diego Biurrun | |
| 138 | 8b6103da | Michael Niedermayer | ip = input; |
| 139 | 44cb64ee | Mike Melanson | |
| 140 | for ( i = 0; i < 8; i++) { |
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| 141 | /* Check for non-zero values (bitwise or faster than ||) */
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| 142 | 8b6103da | Michael Niedermayer | if ( ip[1 * 8] | ip[2 * 8] | ip[3 * 8] | |
| 143 | 44cb64ee | Mike Melanson | ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8] ) { |
| 144 | |||
| 145 | t1 = (int32_t)(xC1S7 * ip[1*8]); |
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| 146 | t2 = (int32_t)(xC7S1 * ip[7*8]); |
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| 147 | t1 >>= 16;
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| 148 | t2 >>= 16;
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| 149 | A_ = t1 + t2; |
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| 150 | |||
| 151 | t1 = (int32_t)(xC7S1 * ip[1*8]); |
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| 152 | t2 = (int32_t)(xC1S7 * ip[7*8]); |
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| 153 | t1 >>= 16;
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| 154 | t2 >>= 16;
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| 155 | B_ = t1 - t2; |
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| 156 | |||
| 157 | t1 = (int32_t)(xC3S5 * ip[3*8]); |
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| 158 | t2 = (int32_t)(xC5S3 * ip[5*8]); |
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| 159 | t1 >>= 16;
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| 160 | t2 >>= 16;
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| 161 | C_ = t1 + t2; |
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| 162 | |||
| 163 | t1 = (int32_t)(xC3S5 * ip[5*8]); |
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| 164 | t2 = (int32_t)(xC5S3 * ip[3*8]); |
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| 165 | t1 >>= 16;
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| 166 | t2 >>= 16;
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| 167 | D_ = t1 - t2; |
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| 168 | |||
| 169 | |||
| 170 | t1 = (int32_t)(xC4S4 * (A_ - C_)); |
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| 171 | t1 >>= 16;
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| 172 | _Ad = t1; |
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| 173 | |||
| 174 | t1 = (int32_t)(xC4S4 * (B_ - D_)); |
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| 175 | t1 >>= 16;
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| 176 | _Bd = t1; |
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| 177 | |||
| 178 | |||
| 179 | _Cd = A_ + C_; |
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| 180 | _Dd = B_ + D_; |
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| 181 | |||
| 182 | t1 = (int32_t)(xC4S4 * (ip[0*8] + ip[4*8])); |
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| 183 | t1 >>= 16;
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| 184 | E_ = t1; |
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| 185 | |||
| 186 | t1 = (int32_t)(xC4S4 * (ip[0*8] - ip[4*8])); |
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| 187 | t1 >>= 16;
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| 188 | F_ = t1; |
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| 189 | |||
| 190 | t1 = (int32_t)(xC2S6 * ip[2*8]); |
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| 191 | t2 = (int32_t)(xC6S2 * ip[6*8]); |
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| 192 | t1 >>= 16;
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| 193 | t2 >>= 16;
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| 194 | G_ = t1 + t2; |
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| 195 | |||
| 196 | t1 = (int32_t)(xC6S2 * ip[2*8]); |
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| 197 | t2 = (int32_t)(xC2S6 * ip[6*8]); |
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| 198 | t1 >>= 16;
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| 199 | t2 >>= 16;
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| 200 | H_ = t1 - t2; |
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| 201 | |||
| 202 | |||
| 203 | _Ed = E_ - G_; |
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| 204 | _Gd = E_ + G_; |
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| 205 | |||
| 206 | _Add = F_ + _Ad; |
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| 207 | _Bdd = _Bd - H_; |
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| 208 | |||
| 209 | _Fd = F_ - _Ad; |
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| 210 | _Hd = _Bd + H_; |
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| 211 | |||
| 212 | 8b6103da | Michael Niedermayer | if(type==1){ //HACK |
| 213 | _Gd += 16*128; |
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| 214 | _Add+= 16*128; |
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| 215 | _Ed += 16*128; |
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| 216 | _Fd += 16*128; |
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| 217 | } |
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| 218 | 44cb64ee | Mike Melanson | _Gd += IdctAdjustBeforeShift; |
| 219 | _Add += IdctAdjustBeforeShift; |
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| 220 | _Ed += IdctAdjustBeforeShift; |
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| 221 | _Fd += IdctAdjustBeforeShift; |
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| 222 | |||
| 223 | /* Final sequence of operations over-write original inputs. */
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| 224 | 8b6103da | Michael Niedermayer | if(type==0){ |
| 225 | ip[0*8] = (_Gd + _Cd ) >> 4; |
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| 226 | ip[7*8] = (_Gd - _Cd ) >> 4; |
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| 227 | 115329f1 | Diego Biurrun | |
| 228 | 8b6103da | Michael Niedermayer | ip[1*8] = (_Add + _Hd ) >> 4; |
| 229 | ip[2*8] = (_Add - _Hd ) >> 4; |
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| 230 | 115329f1 | Diego Biurrun | |
| 231 | 8b6103da | Michael Niedermayer | ip[3*8] = (_Ed + _Dd ) >> 4; |
| 232 | ip[4*8] = (_Ed - _Dd ) >> 4; |
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| 233 | 115329f1 | Diego Biurrun | |
| 234 | 8b6103da | Michael Niedermayer | ip[5*8] = (_Fd + _Bdd ) >> 4; |
| 235 | ip[6*8] = (_Fd - _Bdd ) >> 4; |
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| 236 | }else if(type==1){ |
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| 237 | dst[0*stride] = cm[(_Gd + _Cd ) >> 4]; |
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| 238 | dst[7*stride] = cm[(_Gd - _Cd ) >> 4]; |
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| 239 | 115329f1 | Diego Biurrun | |
| 240 | 8b6103da | Michael Niedermayer | dst[1*stride] = cm[(_Add + _Hd ) >> 4]; |
| 241 | dst[2*stride] = cm[(_Add - _Hd ) >> 4]; |
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| 242 | 115329f1 | Diego Biurrun | |
| 243 | 8b6103da | Michael Niedermayer | dst[3*stride] = cm[(_Ed + _Dd ) >> 4]; |
| 244 | dst[4*stride] = cm[(_Ed - _Dd ) >> 4]; |
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| 245 | 115329f1 | Diego Biurrun | |
| 246 | 8b6103da | Michael Niedermayer | dst[5*stride] = cm[(_Fd + _Bdd ) >> 4]; |
| 247 | dst[6*stride] = cm[(_Fd - _Bdd ) >> 4]; |
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| 248 | }else{
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| 249 | dst[0*stride] = cm[dst[0*stride] + ((_Gd + _Cd ) >> 4)]; |
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| 250 | dst[7*stride] = cm[dst[7*stride] + ((_Gd - _Cd ) >> 4)]; |
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| 251 | 115329f1 | Diego Biurrun | |
| 252 | 8b6103da | Michael Niedermayer | dst[1*stride] = cm[dst[1*stride] + ((_Add + _Hd ) >> 4)]; |
| 253 | dst[2*stride] = cm[dst[2*stride] + ((_Add - _Hd ) >> 4)]; |
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| 254 | 115329f1 | Diego Biurrun | |
| 255 | 8b6103da | Michael Niedermayer | dst[3*stride] = cm[dst[3*stride] + ((_Ed + _Dd ) >> 4)]; |
| 256 | dst[4*stride] = cm[dst[4*stride] + ((_Ed - _Dd ) >> 4)]; |
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| 257 | 115329f1 | Diego Biurrun | |
| 258 | 8b6103da | Michael Niedermayer | dst[5*stride] = cm[dst[5*stride] + ((_Fd + _Bdd ) >> 4)]; |
| 259 | dst[6*stride] = cm[dst[6*stride] + ((_Fd - _Bdd ) >> 4)]; |
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| 260 | } |
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| 261 | 44cb64ee | Mike Melanson | |
| 262 | } else {
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| 263 | 8b6103da | Michael Niedermayer | if(type==0){ |
| 264 | 115329f1 | Diego Biurrun | ip[0*8] = |
| 265 | ip[1*8] = |
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| 266 | ip[2*8] = |
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| 267 | ip[3*8] = |
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| 268 | ip[4*8] = |
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| 269 | ip[5*8] = |
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| 270 | 8b6103da | Michael Niedermayer | ip[6*8] = |
| 271 | ip[7*8] = ((xC4S4 * ip[0*8] + (IdctAdjustBeforeShift<<16))>>20); |
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| 272 | }else if(type==1){ |
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| 273 | dst[0*stride]=
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| 274 | dst[1*stride]=
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| 275 | dst[2*stride]=
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| 276 | dst[3*stride]=
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| 277 | dst[4*stride]=
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| 278 | dst[5*stride]=
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| 279 | dst[6*stride]=
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| 280 | dst[7*stride]= 128 + ((xC4S4 * ip[0*8] + (IdctAdjustBeforeShift<<16))>>20); |
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| 281 | }else{
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| 282 | if(ip[0*8]){ |
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| 283 | int v= ((xC4S4 * ip[0*8] + (IdctAdjustBeforeShift<<16))>>20); |
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| 284 | dst[0*stride] = cm[dst[0*stride] + v]; |
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| 285 | dst[1*stride] = cm[dst[1*stride] + v]; |
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| 286 | dst[2*stride] = cm[dst[2*stride] + v]; |
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| 287 | dst[3*stride] = cm[dst[3*stride] + v]; |
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| 288 | dst[4*stride] = cm[dst[4*stride] + v]; |
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| 289 | dst[5*stride] = cm[dst[5*stride] + v]; |
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| 290 | dst[6*stride] = cm[dst[6*stride] + v]; |
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| 291 | dst[7*stride] = cm[dst[7*stride] + v]; |
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| 292 | } |
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| 293 | } |
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| 294 | 44cb64ee | Mike Melanson | } |
| 295 | |||
| 296 | ip++; /* next column */
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| 297 | 8b6103da | Michael Niedermayer | dst++; |
| 298 | 44cb64ee | Mike Melanson | } |
| 299 | } |
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| 300 | 8b6103da | Michael Niedermayer | |
| 301 | void ff_vp3_idct_c(DCTELEM *block/* align 16*/){ |
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| 302 | idct(NULL, 0, block, 0); |
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| 303 | } |
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| 304 | 115329f1 | Diego Biurrun | |
| 305 | 8b6103da | Michael Niedermayer | void ff_vp3_idct_put_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/){ |
| 306 | idct(dest, line_size, block, 1);
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| 307 | } |
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| 308 | |||
| 309 | void ff_vp3_idct_add_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/){ |
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| 310 | idct(dest, line_size, block, 2);
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| 311 | } |