/src/ffmpeg/libavcodec/h274.c
Line | Count | Source |
1 | | /* |
2 | | * H.274 film grain synthesis |
3 | | * Copyright (c) 2021 Niklas Haas <ffmpeg@haasn.xyz> |
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 | | * H.274 film grain synthesis. |
25 | | * @author Niklas Haas <ffmpeg@haasn.xyz> |
26 | | */ |
27 | | |
28 | | #include <stdatomic.h> |
29 | | |
30 | | #include "libavutil/avassert.h" |
31 | | #include "libavutil/bswap.h" |
32 | | #include "libavcodec/bswapdsp.h" |
33 | | #include "libavutil/crc.h" |
34 | | #include "libavutil/imgutils.h" |
35 | | #include "libavutil/md5.h" |
36 | | #include "libavutil/mem.h" |
37 | | #include "libavutil/thread.h" |
38 | | |
39 | | #include "h274.h" |
40 | | |
41 | | typedef struct H274FilmGrainDatabase { |
42 | | // Database of film grain patterns, lazily computed as-needed |
43 | | int8_t db[13 /* h */][13 /* v */][64][64]; |
44 | | atomic_uint residency[6]; |
45 | | } H274FilmGrainDatabase; |
46 | | |
47 | | static H274FilmGrainDatabase film_grain_db; |
48 | | |
49 | | static const int8_t Gaussian_LUT[2048+4]; |
50 | | static const uint32_t Seed_LUT[256]; |
51 | | static const int8_t R64T[64][64]; |
52 | | |
53 | | static void prng_shift(uint32_t *state) |
54 | 610k | { |
55 | | // Primitive polynomial x^31 + x^3 + 1 (modulo 2) |
56 | 610k | uint32_t x = *state; |
57 | 610k | uint8_t feedback = 1u ^ (x >> 2) ^ (x >> 30); |
58 | 610k | *state = (x << 1) | (feedback & 1u); |
59 | 610k | } |
60 | | |
61 | | static void init_slice_c(int8_t out[64][64], uint8_t h, uint8_t v) |
62 | 26 | { |
63 | 26 | static const uint8_t deblock_factors[13] = { |
64 | 26 | 64, 71, 77, 84, 90, 96, 103, 109, 116, 122, 128, 128, 128 |
65 | 26 | }; |
66 | | |
67 | 26 | const uint8_t deblock_coeff = deblock_factors[v]; |
68 | 26 | const uint8_t freq_h = ((h + 3) << 2) - 1; |
69 | 26 | const uint8_t freq_v = ((v + 3) << 2) - 1; |
70 | | // Temporary buffer for slice generation |
71 | | // FIXME: Static or not? |
72 | 26 | static int16_t tmp[64][64]; |
73 | 26 | uint32_t seed = Seed_LUT[h + v * 13]; |
74 | | |
75 | | // Initialize with random gaussian values, using the output array as a |
76 | | // temporary buffer for these intermediate values. |
77 | | // |
78 | | // Note: To make the subsequent matrix multiplication cache friendlier, we |
79 | | // store each *column* of the starting image in a *row* of `out` |
80 | 830 | for (int l = 0; l <= freq_v; l++) { |
81 | 7.57k | for (int k = 0; k <= freq_h; k += 4) { |
82 | 6.76k | uint16_t offset = seed % 2048; |
83 | 6.76k | out[l][k + 0] = Gaussian_LUT[offset + 0]; |
84 | 6.76k | out[l][k + 1] = Gaussian_LUT[offset + 1]; |
85 | 6.76k | out[l][k + 2] = Gaussian_LUT[offset + 2]; |
86 | 6.76k | out[l][k + 3] = Gaussian_LUT[offset + 3]; |
87 | 6.76k | prng_shift(&seed); |
88 | 6.76k | } |
89 | 804 | } |
90 | | |
91 | 26 | out[0][0] = 0; |
92 | | |
93 | | // 64x64 inverse integer transform |
94 | 1.69k | for (int y = 0; y < 64; y++) { |
95 | 53.1k | for (int x = 0; x <= freq_v; x++) { |
96 | 51.4k | int32_t sum = 0; |
97 | 1.78M | for (int p = 0; p <= freq_h; p++) |
98 | 1.73M | sum += R64T[y][p] * out[x][p]; |
99 | 51.4k | tmp[y][x] = (sum + 128) >> 8; |
100 | 51.4k | } |
101 | 1.66k | } |
102 | | |
103 | 1.69k | for (int y = 0; y < 64; y++) { |
104 | 108k | for (int x = 0; x < 64; x++) { |
105 | 106k | int32_t sum = 0; |
106 | 3.39M | for (int p = 0; p <= freq_v; p++) |
107 | 3.29M | sum += tmp[x][p] * R64T[y][p]; // R64T^T = R64 |
108 | | // Renormalize and clip to [-127, 127] |
109 | 106k | out[y][x] = av_clip((sum + 128) >> 8, -127, 127); |
110 | 106k | } |
111 | 1.66k | } |
112 | | |
113 | | // Deblock horizontal edges by simple attenuation of values |
114 | 234 | for (int y = 0; y < 64; y += 8) { |
115 | 13.5k | for (int x = 0; x < 64; x++) { |
116 | 13.3k | out[y + 0][x] = (out[y + 0][x] * deblock_coeff) >> 7; |
117 | 13.3k | out[y + 7][x] = (out[y + 7][x] * deblock_coeff) >> 7; |
118 | 13.3k | } |
119 | 208 | } |
120 | 26 | } |
121 | | |
122 | | static void init_slice(uint8_t h, uint8_t v) |
123 | 372k | { |
124 | 372k | static AVMutex mutex = AV_MUTEX_INITIALIZER; |
125 | 372k | unsigned bitpos = h * 13 + v; |
126 | 372k | unsigned res = atomic_load_explicit(&film_grain_db.residency[bitpos / 32], |
127 | 372k | memory_order_acquire); |
128 | | |
129 | 372k | if (res & (1U << (bitpos & 31))) |
130 | 372k | return; |
131 | | |
132 | 26 | ff_mutex_lock(&mutex); |
133 | 26 | res = atomic_load_explicit(&film_grain_db.residency[bitpos / 32], memory_order_relaxed); |
134 | 26 | if (!(res & (1U << (bitpos & 31)))) { |
135 | 26 | init_slice_c(film_grain_db.db[h][v], h, v); |
136 | 26 | atomic_store_explicit(&film_grain_db.residency[bitpos / 32], |
137 | 26 | res | (1U << (bitpos & 31)), memory_order_release); |
138 | 26 | } |
139 | 26 | ff_mutex_unlock(&mutex); |
140 | 26 | } |
141 | | |
142 | | // Computes the average of an 8x8 block |
143 | | static uint16_t avg_8x8_c(const uint8_t *in, int in_stride) |
144 | 2.19M | { |
145 | 2.19M | uint16_t avg[8] = {0}; // summing over an array vectorizes better |
146 | | |
147 | 19.7M | for (int y = 0; y < 8; y++) { |
148 | 158M | for (int x = 0; x < 8; x++) |
149 | 140M | avg[x] += in[x]; |
150 | 17.5M | in += in_stride; |
151 | 17.5M | } |
152 | | |
153 | 2.19M | return (avg[0] + avg[1] + avg[2] + avg[3] + |
154 | 2.19M | avg[4] + avg[5] + avg[6] + avg[7]) >> 6; |
155 | 2.19M | } |
156 | | |
157 | | // Synthesize an 8x8 block of film grain by copying the pattern from `db` |
158 | | static void synth_grain_8x8_c(int8_t *out, const int out_stride, |
159 | | const int16_t scale, const uint8_t shift, |
160 | | const int8_t *db) |
161 | 372k | { |
162 | 3.35M | for (int y = 0; y < 8; y++) { |
163 | 26.8M | for (int x = 0; x < 8; x++) |
164 | 23.8M | out[x] = (scale * db[x]) >> shift; |
165 | | |
166 | 2.98M | out += out_stride; |
167 | 2.98M | db += 64; |
168 | 2.98M | } |
169 | 372k | } |
170 | | |
171 | | // Deblock vertical edges of an 8x8 block, mixing with the previous block |
172 | | static void deblock_8x8_c(int8_t *out, const int out_stride) |
173 | 252k | { |
174 | 2.27M | for (int y = 0; y < 8; y++) { |
175 | 2.02M | const int8_t l1 = out[-2], l0 = out[-1]; |
176 | 2.02M | const int8_t r0 = out[0], r1 = out[1]; |
177 | 2.02M | out[0] = (l0 + r0 * 2 + r1) >> 2; |
178 | 2.02M | out[-1] = (r0 + l0 * 2 + l1) >> 2; |
179 | 2.02M | out += out_stride; |
180 | 2.02M | } |
181 | 252k | } |
182 | | |
183 | | // Generates a single 8x8 block of grain, optionally also applying the |
184 | | // deblocking step (note that this implies writing to the previous block). |
185 | | static av_always_inline void generate(int8_t *out, int out_stride, |
186 | | const uint8_t *in, int in_stride, |
187 | | const AVFilmGrainH274Params *h274, |
188 | | int c, int invert, int deblock, |
189 | | int y_offset, int x_offset) |
190 | 2.19M | { |
191 | 2.19M | const uint8_t shift = h274->log2_scale_factor + 6; |
192 | 2.19M | const uint16_t avg = avg_8x8_c(in, in_stride); |
193 | 2.19M | int16_t scale; |
194 | 2.19M | uint8_t h, v; |
195 | 2.19M | int8_t s = -1; |
196 | | |
197 | | // FIXME: This logic only generates grain with a single |
198 | | // intensity interval. Strictly speaking, the H.274 specification allows |
199 | | // for overlapping intensity intervals, however SMPTE RDD 5-2006 (which |
200 | | // concerns the implementation of H.274 for H.264) forbids this as it |
201 | | // requires a nontrivial grain synthesis process (FFT). |
202 | | // |
203 | | // In principle, we should detect this possibility ahead of time and warn |
204 | | // the user that the output is unlikely to be correct, or alternatively |
205 | | // return an AVERROR_PATCHWELCOME. |
206 | 103M | for (int i = 0; i < h274->num_intensity_intervals[c]; i++) { |
207 | 101M | if (avg >= h274->intensity_interval_lower_bound[c][i] && |
208 | 45.2M | avg <= h274->intensity_interval_upper_bound[c][i]) |
209 | 372k | { |
210 | 372k | s = i; |
211 | 372k | break; |
212 | 372k | } |
213 | 101M | } |
214 | | |
215 | 2.19M | if (s < 0) { |
216 | | // No matching intensity interval, synthesize blank film grain |
217 | 16.3M | for (int y = 0; y < 8; y++) |
218 | 14.5M | memset(out + y * out_stride, 0, sizeof(int8_t[8])); |
219 | 1.82M | return; |
220 | 1.82M | } |
221 | | |
222 | 372k | h = av_clip(h274->comp_model_value[c][s][1], 2, 14) - 2; |
223 | 372k | v = av_clip(h274->comp_model_value[c][s][2], 2, 14) - 2; |
224 | 372k | init_slice(h, v); |
225 | | |
226 | 372k | scale = h274->comp_model_value[c][s][0]; |
227 | 372k | if (invert) |
228 | 183k | scale = -scale; |
229 | | |
230 | 372k | synth_grain_8x8_c(out, out_stride, scale, shift, |
231 | 372k | &film_grain_db.db[h][v][y_offset][x_offset]); |
232 | | |
233 | 372k | if (deblock) |
234 | 252k | deblock_8x8_c(out, out_stride); |
235 | 372k | } |
236 | | |
237 | | // Saturating 8-bit sum of a+b |
238 | | static void add_8x8_clip_c(uint8_t *out, const uint8_t *a, const int8_t *b, |
239 | | int n) |
240 | 2.25M | { |
241 | 142M | for (int i = 0; i < n; i++) |
242 | 140M | out[i] = av_clip_uint8(a[i] + b[i]); |
243 | 2.25M | } |
244 | | |
245 | | int ff_h274_apply_film_grain(AVFrame *out_frame, const AVFrame *in_frame, |
246 | | const AVFilmGrainParams *params) |
247 | 3.40k | { |
248 | 3.40k | AVFilmGrainH274Params h274 = params->codec.h274; |
249 | 3.40k | av_assert1(params->type == AV_FILM_GRAIN_PARAMS_H274); |
250 | 3.40k | if (h274.model_id != 0) |
251 | 429 | return AVERROR_PATCHWELCOME; |
252 | | |
253 | 2.97k | av_assert1(out_frame->format == in_frame->format); |
254 | 2.97k | if (in_frame->format != AV_PIX_FMT_YUV420P) |
255 | 1.04k | return AVERROR_PATCHWELCOME; |
256 | | |
257 | 7.70k | for (int c = 0; c < 3; c++) { |
258 | 5.78k | static const uint8_t color_offset[3] = { 0, 85, 170 }; |
259 | 5.78k | uint32_t seed = Seed_LUT[(params->seed + color_offset[c]) % 256]; |
260 | 5.78k | const int width = c > 0 ? AV_CEIL_RSHIFT(out_frame->width, 1) : out_frame->width; |
261 | 5.78k | const int height = c > 0 ? AV_CEIL_RSHIFT(out_frame->height, 1) : out_frame->height; |
262 | | |
263 | 5.78k | uint8_t * const out = out_frame->data[c]; |
264 | 5.78k | const int out_stride = out_frame->linesize[c]; |
265 | 5.78k | int8_t * const grain = out_frame->data[c]; // reuse output buffer for grain |
266 | 5.78k | const int grain_stride = out_stride; |
267 | 5.78k | const uint8_t * const in = in_frame->data[c]; |
268 | 5.78k | const int in_stride = in_frame->linesize[c]; |
269 | | |
270 | 5.78k | if (!h274.component_model_present[c]) { |
271 | 3.53k | av_image_copy_plane(out, out_stride, in, in_stride, |
272 | 3.53k | width * sizeof(uint8_t), height); |
273 | 3.53k | continue; |
274 | 3.53k | } |
275 | | |
276 | 2.24k | if (c > 0) { |
277 | | // Adaptation for 4:2:0 chroma subsampling |
278 | 119k | for (int i = 0; i < h274.num_intensity_intervals[c]; i++) { |
279 | 118k | h274.comp_model_value[c][i][0] >>= 1; |
280 | 118k | h274.comp_model_value[c][i][1] *= 2; |
281 | 118k | h274.comp_model_value[c][i][2] *= 2; |
282 | 118k | } |
283 | 1.39k | } |
284 | | |
285 | | // Film grain synthesis is done in 8x8 blocks, but the PRNG state is |
286 | | // only advanced in 16x16 blocks, so use a nested loop |
287 | 143k | for (int y = 0; y < height; y += 16) { |
288 | 745k | for (int x = 0; x < width; x += 16) { |
289 | 603k | uint16_t x_offset = (seed >> 16) % 52; |
290 | 603k | uint16_t y_offset = (seed & 0xFFFF) % 56; |
291 | 603k | const int invert = (seed & 0x1); |
292 | 603k | x_offset &= 0xFFFC; |
293 | 603k | y_offset &= 0xFFF8; |
294 | 603k | prng_shift(&seed); |
295 | | |
296 | 1.78M | for (int yy = 0; yy < 16 && y+yy < height; yy += 8) { |
297 | 3.38M | for (int xx = 0; xx < 16 && x+xx < width; xx += 8) { |
298 | 2.19M | generate(grain + (y+yy) * grain_stride + (x+xx), grain_stride, |
299 | 2.19M | in + (y+yy) * in_stride + (x+xx), in_stride, |
300 | 2.19M | &h274, c, invert, (x+xx) > 0, |
301 | 2.19M | y_offset + yy, x_offset + xx); |
302 | 2.19M | } |
303 | 1.18M | } |
304 | 603k | } |
305 | 141k | } |
306 | | |
307 | | // Final output blend pass, done after grain synthesis is complete |
308 | | // because deblocking depends on previous grain values |
309 | 2.26M | for (int y = 0; y < height; y++) { |
310 | 2.25M | add_8x8_clip_c(out + y * out_stride, in + y * in_stride, |
311 | 2.25M | grain + y * grain_stride, width); |
312 | 2.25M | } |
313 | 2.24k | } |
314 | | |
315 | 1.92k | return 0; |
316 | 2.97k | } |
317 | | |
318 | | // These tables are all taken from the SMPTE RDD 5-2006 specification |
319 | | static const int8_t Gaussian_LUT[2048+4] = { |
320 | | -11, 12, 103, -11, 42, -35, 12, 59, 77, 98, -87, 3, 65, -78, 45, 56, -51, 21, |
321 | | 13, -11, -20, -19, 33, -127, 17, -6, -105, 18, 19, 71, 48, -10, -38, 42, |
322 | | -2, 75, -67, 52, -90, 33, -47, 21, -3, -56, 49, 1, -57, -42, -1, 120, -127, |
323 | | -108, -49, 9, 14, 127, 122, 109, 52, 127, 2, 7, 114, 19, 30, 12, 77, 112, |
324 | | 82, -61, -127, 111, -52, -29, 2, -49, -24, 58, -29, -73, 12, 112, 67, 79, |
325 | | -3, -114, -87, -6, -5, 40, 58, -81, 49, -27, -31, -34, -105, 50, 16, -24, |
326 | | -35, -14, -15, -127, -55, -22, -55, -127, -112, 5, -26, -72, 127, 127, -2, |
327 | | 41, 87, -65, -16, 55, 19, 91, -81, -65, -64, 35, -7, -54, 99, -7, 88, 125, |
328 | | -26, 91, 0, 63, 60, -14, -23, 113, -33, 116, 14, 26, 51, -16, 107, -8, 53, |
329 | | 38, -34, 17, -7, 4, -91, 6, 63, 63, -15, 39, -36, 19, 55, 17, -51, 40, 33, |
330 | | -37, 126, -39, -118, 17, -30, 0, 19, 98, 60, 101, -12, -73, -17, -52, 98, |
331 | | 3, 3, 60, 33, -3, -2, 10, -42, -106, -38, 14, 127, 16, -127, -31, -86, -39, |
332 | | -56, 46, -41, 75, 23, -19, -22, -70, 74, -54, -2, 32, -45, 17, -92, 59, |
333 | | -64, -67, 56, -102, -29, -87, -34, -92, 68, 5, -74, -61, 93, -43, 14, -26, |
334 | | -38, -126, -17, 16, -127, 64, 34, 31, 93, 17, -51, -59, 71, 77, 81, 127, |
335 | | 127, 61, 33, -106, -93, 0, 0, 75, -69, 71, 127, -19, -111, 30, 23, 15, 2, |
336 | | 39, 92, 5, 42, 2, -6, 38, 15, 114, -30, -37, 50, 44, 106, 27, 119, 7, -80, |
337 | | 25, -68, -21, 92, -11, -1, 18, 41, -50, 79, -127, -43, 127, 18, 11, -21, |
338 | | 32, -52, 27, -88, -90, -39, -19, -10, 24, -118, 72, -24, -44, 2, 12, 86, |
339 | | -107, 39, -33, -127, 47, 51, -24, -22, 46, 0, 15, -35, -69, -2, -74, 24, |
340 | | -6, 0, 29, -3, 45, 32, -32, 117, -45, 79, -24, -17, -109, -10, -70, 88, |
341 | | -48, 24, -91, 120, -37, 50, -127, 58, 32, -82, -10, -17, -7, 46, -127, -15, |
342 | | 89, 127, 17, 98, -39, -33, 37, 42, -40, -32, -21, 105, -19, 19, 19, -59, |
343 | | -9, 30, 0, -127, 34, 127, -84, 75, 24, -40, -49, -127, -107, -14, 45, -75, |
344 | | 1, 30, -20, 41, -68, -40, 12, 127, -3, 5, 20, -73, -59, -127, -3, -3, -53, |
345 | | -6, -119, 93, 120, -80, -50, 0, 20, -46, 67, 78, -12, -22, -127, 36, -41, |
346 | | 56, 119, -5, -116, -22, 68, -14, -90, 24, -82, -44, -127, 107, -25, -37, |
347 | | 40, -7, -7, -82, 5, -87, 44, -34, 9, -127, 39, 70, 49, -63, 74, -49, 109, |
348 | | -27, -89, -47, -39, 44, 49, -4, 60, -42, 80, 9, -127, -9, -56, -49, 125, |
349 | | -66, 47, 36, 117, 15, -11, -96, 109, 94, -17, -56, 70, 8, -14, -5, 50, 37, |
350 | | -45, 120, -30, -76, 40, -46, 6, 3, 69, 17, -78, 1, -79, 6, 127, 43, 26, |
351 | | 127, -127, 28, -55, -26, 55, 112, 48, 107, -1, -77, -1, 53, -9, -22, -43, |
352 | | 123, 108, 127, 102, 68, 46, 5, 1, 123, -13, -55, -34, -49, 89, 65, -105, |
353 | | -5, 94, -53, 62, 45, 30, 46, 18, -35, 15, 41, 47, -98, -24, 94, -75, 127, |
354 | | -114, 127, -68, 1, -17, 51, -95, 47, 12, 34, -45, -75, 89, -107, -9, -58, |
355 | | -29, -109, -24, 127, -61, -13, 77, -45, 17, 19, 83, -24, 9, 127, -66, 54, |
356 | | 4, 26, 13, 111, 43, -113, -22, 10, -24, 83, 67, -14, 75, -123, 59, 127, |
357 | | -12, 99, -19, 64, -38, 54, 9, 7, 61, -56, 3, -57, 113, -104, -59, 3, -9, |
358 | | -47, 74, 85, -55, -34, 12, 118, 28, 93, -72, 13, -99, -72, -20, 30, 72, |
359 | | -94, 19, -54, 64, -12, -63, -25, 65, 72, -10, 127, 0, -127, 103, -20, -73, |
360 | | -112, -103, -6, 28, -42, -21, -59, -29, -26, 19, -4, -51, 94, -58, -95, |
361 | | -37, 35, 20, -69, 127, -19, -127, -22, -120, -53, 37, 74, -127, -1, -12, |
362 | | -119, -53, -28, 38, 69, 17, 16, -114, 89, 62, 24, 37, -23, 49, -101, -32, |
363 | | -9, -95, -53, 5, 93, -23, -49, -8, 51, 3, -75, -90, -10, -39, 127, -86, |
364 | | -22, 20, 20, 113, 75, 52, -31, 92, -63, 7, -12, 46, 36, 101, -43, -17, -53, |
365 | | -7, -38, -76, -31, -21, 62, 31, 62, 20, -127, 31, 64, 36, 102, -85, -10, |
366 | | 77, 80, 58, -79, -8, 35, 8, 80, -24, -9, 3, -17, 72, 127, 83, -87, 55, 18, |
367 | | -119, -123, 36, 10, 127, 56, -55, 113, 13, 26, 32, -13, -48, 22, -13, 5, |
368 | | 58, 27, 24, 26, -11, -36, 37, -92, 78, 81, 9, 51, 14, 67, -13, 0, 32, 45, |
369 | | -76, 32, -39, -22, -49, -127, -27, 31, -9, 36, 14, 71, 13, 57, 12, -53, |
370 | | -86, 53, -44, -35, 2, 127, 12, -66, -44, 46, -115, 3, 10, 56, -35, 119, |
371 | | -19, -61, 52, -59, -127, -49, -23, 4, -5, 17, -82, -6, 127, 25, 79, 67, 64, |
372 | | -25, 14, -64, -37, -127, -28, 21, -63, 66, -53, -41, 109, -62, 15, -22, 13, |
373 | | 29, -63, 20, 27, 95, -44, -59, -116, -10, 79, -49, 22, -43, -16, 46, -47, |
374 | | -120, -36, -29, -52, -44, 29, 127, -13, 49, -9, -127, 75, -28, -23, 88, 59, |
375 | | 11, -95, 81, -59, 58, 60, -26, 40, -92, -3, -22, -58, -45, -59, -22, -53, |
376 | | 71, -29, 66, -32, -23, 14, -17, -66, -24, -28, -62, 47, 38, 17, 16, -37, |
377 | | -24, -11, 8, -27, -19, 59, 45, -49, -47, -4, -22, -81, 30, -67, -127, 74, |
378 | | 102, 5, -18, 98, 34, -66, 42, -52, 7, -59, 24, -58, -19, -24, -118, -73, |
379 | | 91, 15, -16, 79, -32, -79, -127, -36, 41, 77, -83, 2, 56, 22, -75, 127, |
380 | | -16, -21, 12, 31, 56, -113, -127, 90, 55, 61, 12, 55, -14, -113, -14, 32, |
381 | | 49, -67, -17, 91, -10, 1, 21, 69, -70, 99, -19, -112, 66, -90, -10, -9, |
382 | | -71, 127, 50, -81, -49, 24, 61, -61, -111, 7, -41, 127, 88, -66, 108, -127, |
383 | | -6, 36, -14, 41, -50, 14, 14, 73, -101, -28, 77, 127, -8, -100, 88, 38, |
384 | | 121, 88, -125, -60, 13, -94, -115, 20, -67, -87, -94, -119, 44, -28, -30, |
385 | | 18, 5, -53, -61, 20, -43, 11, -77, -60, 13, 29, 3, 6, -72, 38, -60, -11, |
386 | | 108, -53, 41, 66, -12, -127, -127, -49, 24, 29, 46, 36, 91, 34, -33, 116, |
387 | | -51, -34, -52, 91, 7, -83, 73, -26, -103, 24, -10, 76, 84, 5, 68, -80, -13, |
388 | | -17, -32, -48, 20, 50, 26, 10, 63, -104, -14, 37, 127, 114, 97, 35, 1, -33, |
389 | | -55, 127, -124, -33, 61, -7, 119, -32, -127, -53, -42, 63, 3, -5, -26, 70, |
390 | | -58, -33, -44, -43, 34, -56, -127, 127, 25, -35, -11, 16, -81, 29, -58, 40, |
391 | | -127, -127, 20, -47, -11, -36, -63, -52, -32, -82, 78, -76, -73, 8, 27, |
392 | | -72, -9, -74, -85, -86, -57, 25, 78, -10, -97, 35, -65, 8, -59, 14, 1, -42, |
393 | | 32, -88, -44, 17, -3, -9, 59, 40, 12, -108, -40, 24, 34, 18, -28, 2, 51, |
394 | | -110, -4, 100, 1, 65, 22, 0, 127, 61, 45, 25, -31, 6, 9, -7, -48, 99, 16, |
395 | | 44, -2, -40, 32, -39, -52, 10, -110, -19, 56, -127, 69, 26, 51, 92, 40, 61, |
396 | | -52, 45, -38, 13, 85, 122, 27, 66, 45, -111, -83, -3, 31, 37, 19, -36, 58, |
397 | | 71, 39, -78, -47, 58, -78, 8, -62, -36, -14, 61, 42, -127, 71, -4, 24, -54, |
398 | | 52, -127, 67, -4, -42, 30, -63, 59, -3, -1, -18, -46, -92, -81, -96, -14, |
399 | | -53, -10, -11, -77, 13, 1, 8, -67, -127, 127, -28, 26, -14, 18, -13, -26, |
400 | | 2, 10, -46, -32, -15, 27, -31, -59, 59, 77, -121, 28, 40, -54, -62, -31, |
401 | | -21, -37, -32, -6, -127, -25, -60, 70, -127, 112, -127, 127, 88, -7, 116, |
402 | | 110, 53, 87, -127, 3, 16, 23, 74, -106, -51, 3, 74, -82, -112, -74, 65, 81, |
403 | | 25, 53, 127, -45, -50, -103, -41, -65, -29, 79, -67, 64, -33, -30, -8, 127, |
404 | | 0, -13, -51, 67, -14, 5, -92, 29, -35, -8, -90, -57, -3, 36, 43, 44, -31, |
405 | | -69, -7, 36, 39, -51, 43, -81, 58, 6, 127, 12, 57, 66, 46, 59, -43, -42, |
406 | | 41, -15, -120, 24, 3, -11, 19, -13, 51, 28, 3, 55, -48, -12, -1, 2, 97, |
407 | | -19, 29, 42, 13, 43, 78, -44, 56, -108, -43, -19, 127, 15, -11, -18, -81, |
408 | | 83, -37, 77, -109, 15, 65, -50, 43, 12, 13, 27, 28, 61, 57, 30, 26, 106, |
409 | | -18, 56, 13, 97, 4, -8, -62, -103, 94, 108, -44, 52, 27, -47, -9, 105, -53, |
410 | | 46, 89, 103, -33, 38, -34, 55, 51, 70, -94, -35, -87, -107, -19, -31, 9, |
411 | | -19, 79, -14, 77, 5, -19, -107, 85, 21, -45, -39, -42, 9, -29, 74, 47, -75, |
412 | | 60, -127, 120, -112, -57, -32, 41, 7, 79, 76, 66, 57, 41, -25, 31, 37, -47, |
413 | | -36, 43, -73, -37, 63, 127, -69, -52, 90, -33, -61, 60, -55, 44, 15, 4, |
414 | | -67, 13, -92, 64, 29, -39, -3, 83, -2, -38, -85, -86, 58, 35, -69, -61, 29, |
415 | | -37, -95, -78, 4, 30, -4, -32, -80, -22, -9, -77, 46, 7, -93, -71, 65, 9, |
416 | | -50, 127, -70, 26, -12, -39, -114, 63, -127, -100, 4, -32, 111, 22, -60, |
417 | | 65, -101, 26, -42, 21, -59, -27, -74, 2, -94, 6, 126, 5, 76, -88, -9, -43, |
418 | | -101, 127, 1, 125, 92, -63, 52, 56, 4, 81, -127, 127, 80, 127, -29, 30, |
419 | | 116, -74, -17, -57, 105, 48, 45, 25, -72, 48, -38, -108, 31, -34, 4, -11, |
420 | | 41, -127, 52, -104, -43, -37, 52, 2, 47, 87, -9, 77, 27, -41, -25, 90, 86, |
421 | | -56, 75, 10, 33, 78, 58, 127, 127, -7, -73, 49, -33, -106, -35, 38, 57, 53, |
422 | | -17, -4, 83, 52, -108, 54, -125, 28, 23, 56, -43, -88, -17, -6, 47, 23, -9, |
423 | | 0, -13, 111, 75, 27, -52, -38, -34, 39, 30, 66, 39, 38, -64, 38, 3, 21, |
424 | | -32, -51, -28, 54, -38, -87, 20, 52, 115, 18, -81, -70, 0, -14, -46, -46, |
425 | | -3, 125, 16, -14, 23, -82, -84, -69, -20, -65, -127, 9, 81, -49, 61, 7, |
426 | | -36, -45, -42, 57, -26, 47, 20, -85, 46, -13, 41, -37, -75, -60, 86, -78, |
427 | | -127, 12, 50, 2, -3, 13, 47, 5, 19, -78, -55, -27, 65, -71, 12, -108, 20, |
428 | | -16, 11, -31, 63, -55, 37, 75, -17, 127, -73, -33, -28, -120, 105, 68, 106, |
429 | | -103, -106, 71, 61, 2, 23, -3, 33, -5, -15, -67, -15, -23, -54, 15, -63, |
430 | | 76, 58, -110, 1, 83, -27, 22, 75, -39, -17, -11, 64, -17, -127, -54, -66, |
431 | | 31, 96, 116, 3, -114, -7, -108, -63, 97, 9, 50, 8, 75, -28, 72, 112, -36, |
432 | | -112, 95, -50, 23, -13, -19, 55, 21, 23, 92, 91, 22, -49, 16, -75, 23, 9, |
433 | | -49, -97, -37, 49, -36, 36, -127, -86, 43, 127, -24, -24, 84, 83, -35, -34, |
434 | | -12, 109, 102, -38, 51, -68, 34, 19, -22, 49, -32, 127, 40, 24, -93, -4, |
435 | | -3, 105, 3, -58, -18, 8, 127, -18, 125, 68, 69, -62, 30, -36, 54, -57, -24, |
436 | | 17, 43, -36, -27, -57, -67, -21, -10, -49, 68, 12, 65, 4, 48, 55, 127, -75, |
437 | | 44, 89, -66, -13, -78, -82, -91, 22, 30, 33, -40, -87, -34, 96, -91, 39, |
438 | | 10, -64, -3, -12, 127, -50, -37, -56, 23, -35, -36, -54, 90, -91, 2, 50, |
439 | | 77, -6, -127, 16, 46, -5, -73, 0, -56, -18, -72, 28, 93, 60, 49, 20, 18, |
440 | | 111, -111, 32, -83, 47, 47, -10, 35, -88, 43, 57, -98, 127, -17, 0, 1, -39, |
441 | | -127, -2, 0, 63, 93, 0, 36, -66, -61, -19, 39, -127, 58, 50, -17, 127, 88, |
442 | | -43, -108, -51, -16, 7, -36, 68, 46, -14, 107, 40, 57, 7, 19, 8, 3, 88, |
443 | | -90, -92, -18, -21, -24, 13, 7, -4, -78, -91, -4, 8, -35, -5, 19, 2, -111, |
444 | | 4, -66, -81, 122, -20, -34, -37, -84, 127, 68, 46, 17, 47, |
445 | | |
446 | | // Repeat the beginning of the array to allow wrapping reads |
447 | | -11, 12, 103, -11, |
448 | | }; |
449 | | |
450 | | static const uint32_t Seed_LUT[256] = { |
451 | | 747538460, 1088979410, 1744950180, 1767011913, 1403382928, |
452 | | 521866116, 1060417601, 2110622736, 1557184770, 105289385, 585624216, |
453 | | 1827676546, 1191843873, 1018104344, 1123590530, 663361569, 2023850500, |
454 | | 76561770, 1226763489, 80325252, 1992581442, 502705249, 740409860, |
455 | | 516219202, 557974537, 1883843076, 720112066, 1640137737, 1820967556, |
456 | | 40667586, 155354121, 1820967557, 1115949072, 1631803309, 98284748, |
457 | | 287433856, 2119719977, 988742797, 1827432592, 579378475, 1017745956, |
458 | | 1309377032, 1316535465, 2074315269, 1923385360, 209722667, 1546228260, |
459 | | 168102420, 135274561, 355958469, 248291472, 2127839491, 146920100, |
460 | | 585982612, 1611702337, 696506029, 1386498192, 1258072451, 1212240548, |
461 | | 1043171860, 1217404993, 1090770605, 1386498193, 169093201, 541098240, |
462 | | 1468005469, 456510673, 1578687785, 1838217424, 2010752065, 2089828354, |
463 | | 1362717428, 970073673, 854129835, 714793201, 1266069081, 1047060864, |
464 | | 1991471829, 1098097741, 913883585, 1669598224, 1337918685, 1219264706, |
465 | | 1799741108, 1834116681, 683417731, 1120274457, 1073098457, 1648396544, |
466 | | 176642749, 31171789, 718317889, 1266977808, 1400892508, 549749008, |
467 | | 1808010512, 67112961, 1005669825, 903663673, 1771104465, 1277749632, |
468 | | 1229754427, 950632997, 1979371465, 2074373264, 305357524, 1049387408, |
469 | | 1171033360, 1686114305, 2147468765, 1941195985, 117709841, 809550080, |
470 | | 991480851, 1816248997, 1561503561, 329575568, 780651196, 1659144592, |
471 | | 1910793616, 604016641, 1665084765, 1530186961, 1870928913, 809550081, |
472 | | 2079346113, 71307521, 876663040, 1073807360, 832356664, 1573927377, |
473 | | 204073344, 2026918147, 1702476788, 2043881033, 57949587, 2001393952, |
474 | | 1197426649, 1186508931, 332056865, 950043140, 890043474, 349099312, |
475 | | 148914948, 236204097, 2022643605, 1441981517, 498130129, 1443421481, |
476 | | 924216797, 1817491777, 1913146664, 1411989632, 929068432, 495735097, |
477 | | 1684636033, 1284520017, 432816184, 1344884865, 210843729, 676364544, |
478 | | 234449232, 12112337, 1350619139, 1753272996, 2037118872, 1408560528, |
479 | | 533334916, 1043640385, 357326099, 201376421, 110375493, 541106497, |
480 | | 416159637, 242512193, 777294080, 1614872576, 1535546636, 870600145, |
481 | | 910810409, 1821440209, 1605432464, 1145147393, 951695441, 1758494976, |
482 | | 1506656568, 1557150160, 608221521, 1073840384, 217672017, 684818688, |
483 | | 1750138880, 16777217, 677990609, 953274371, 1770050213, 1359128393, |
484 | | 1797602707, 1984616737, 1865815816, 2120835200, 2051677060, 1772234061, |
485 | | 1579794881, 1652821009, 1742099468, 1887260865, 46468113, 1011925248, |
486 | | 1134107920, 881643832, 1354774993, 472508800, 1892499769, 1752793472, |
487 | | 1962502272, 687898625, 883538000, 1354355153, 1761673473, 944820481, |
488 | | 2020102353, 22020353, 961597696, 1342242816, 964808962, 1355809701, |
489 | | 17016649, 1386540177, 647682692, 1849012289, 751668241, 1557184768, |
490 | | 127374604, 1927564752, 1045744913, 1614921984, 43588881, 1016185088, |
491 | | 1544617984, 1090519041, 136122424, 215038417, 1563027841, 2026918145, |
492 | | 1688778833, 701530369, 1372639488, 1342242817, 2036945104, 953274369, |
493 | | 1750192384, 16842753, 964808960, 1359020032, 1358954497 |
494 | | }; |
495 | | |
496 | | // Note: This is pre-transposed, i.e. stored column-major order |
497 | | static const int8_t R64T[64][64] = { |
498 | | { |
499 | | 32, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 43, 43, 43, 42, |
500 | | 42, 41, 41, 40, 40, 39, 39, 38, 38, 37, 36, 36, 35, 34, 34, 33, |
501 | | 32, 31, 30, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, |
502 | | 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 4, 3, 2, 1, |
503 | | }, { |
504 | | 32, 45, 45, 44, 43, 42, 41, 39, 38, 36, 34, 31, 29, 26, 23, 20, |
505 | | 17, 14, 11, 8, 4, 1, -2, -6, -9, -12, -15, -18, -21, -24, -27, -30, |
506 | | -32, -34, -36, -38, -40, -41, -43, -44, -44, -45, -45, -45, -45, -45, -44, -43, |
507 | | -42, -40, -39, -37, -35, -33, -30, -28, -25, -22, -19, -16, -13, -10, -7, -3, |
508 | | }, { |
509 | | 32, 45, 44, 42, 40, 37, 34, 30, 25, 20, 15, 10, 4, -1, -7, -12, |
510 | | -17, -22, -27, -31, -35, -38, -41, -43, -44, -45, -45, -45, -43, -41, -39, -36, |
511 | | -32, -28, -23, -18, -13, -8, -2, 3, 9, 14, 19, 24, 29, 33, 36, 39, |
512 | | 42, 44, 45, 45, 45, 44, 43, 40, 38, 34, 30, 26, 21, 16, 11, 6, |
513 | | }, { |
514 | | 32, 45, 43, 39, 35, 30, 23, 16, 9, 1, -7, -14, -21, -28, -34, -38, |
515 | | -42, -44, -45, -45, -43, -40, -36, -31, -25, -18, -11, -3, 4, 12, 19, 26, |
516 | | 32, 37, 41, 44, 45, 45, 44, 41, 38, 33, 27, 20, 13, 6, -2, -10, |
517 | | -17, -24, -30, -36, -40, -43, -45, -45, -44, -42, -39, -34, -29, -22, -15, -8, |
518 | | }, { |
519 | | 32, 44, 41, 36, 29, 20, 11, 1, -9, -18, -27, -34, -40, -44, -45, -45, |
520 | | -42, -37, -30, -22, -13, -3, 7, 16, 25, 33, 39, 43, 45, 45, 43, 38, |
521 | | 32, 24, 15, 6, -4, -14, -23, -31, -38, -42, -45, -45, -43, -39, -34, -26, |
522 | | -17, -8, 2, 12, 21, 30, 36, 41, 44, 45, 44, 40, 35, 28, 19, 10, |
523 | | }, { |
524 | | 32, 44, 39, 31, 21, 10, -2, -14, -25, -34, -41, -45, -45, -42, -36, -28, |
525 | | -17, -6, 7, 18, 29, 37, 43, 45, 44, 40, 34, 24, 13, 1, -11, -22, |
526 | | -32, -39, -44, -45, -43, -38, -30, -20, -9, 3, 15, 26, 35, 41, 45, 45, |
527 | | 42, 36, 27, 16, 4, -8, -19, -30, -38, -43, -45, -44, -40, -33, -23, -12, |
528 | | }, { |
529 | | 32, 43, 36, 26, 13, -1, -15, -28, -38, -44, -45, -42, -35, -24, -11, 3, |
530 | | 17, 30, 39, 44, 45, 41, 34, 22, 9, -6, -19, -31, -40, -45, -45, -40, |
531 | | -32, -20, -7, 8, 21, 33, 41, 45, 44, 39, 30, 18, 4, -10, -23, -34, |
532 | | -42, -45, -44, -38, -29, -16, -2, 12, 25, 36, 43, 45, 43, 37, 27, 14, |
533 | | }, { |
534 | | 32, 42, 34, 20, 4, -12, -27, -38, -44, -45, -39, -28, -13, 3, 19, 33, |
535 | | 42, 45, 43, 34, 21, 6, -11, -26, -38, -44, -45, -39, -29, -14, 2, 18, |
536 | | 32, 41, 45, 43, 35, 22, 7, -10, -25, -37, -44, -45, -40, -30, -15, 1, |
537 | | 17, 31, 41, 45, 43, 36, 23, 8, -9, -24, -36, -44, -45, -40, -30, -16, |
538 | | }, { |
539 | | 32, 41, 30, 14, -4, -22, -36, -44, -44, -37, -23, -6, 13, 30, 41, 45, |
540 | | 42, 31, 15, -3, -21, -36, -44, -45, -38, -24, -7, 12, 29, 40, 45, 42, |
541 | | 32, 16, -2, -20, -35, -44, -45, -38, -25, -8, 11, 28, 40, 45, 43, 33, |
542 | | 17, -1, -19, -34, -43, -45, -39, -26, -9, 10, 27, 39, 45, 43, 34, 18, |
543 | | }, { |
544 | | 32, 40, 27, 8, -13, -31, -43, -45, -38, -22, -2, 18, 35, 44, 44, 34, |
545 | | 17, -3, -23, -38, -45, -42, -30, -12, 9, 28, 41, 45, 40, 26, 7, -14, |
546 | | -32, -43, -45, -37, -21, -1, 19, 36, 44, 44, 34, 16, -4, -24, -39, -45, |
547 | | -42, -30, -11, 10, 29, 41, 45, 39, 25, 6, -15, -33, -43, -45, -36, -20, |
548 | | }, { |
549 | | 32, 39, 23, 1, -21, -38, -45, -40, -25, -3, 19, 37, 45, 41, 27, 6, |
550 | | -17, -36, -45, -42, -29, -8, 15, 34, 44, 43, 30, 10, -13, -33, -44, -44, |
551 | | -32, -12, 11, 31, 43, 44, 34, 14, -9, -30, -43, -45, -35, -16, 7, 28, |
552 | | 42, 45, 36, 18, -4, -26, -41, -45, -38, -20, 2, 24, 40, 45, 39, 22, |
553 | | }, { |
554 | | 32, 38, 19, -6, -29, -43, -44, -31, -9, 16, 36, 45, 40, 22, -2, -26, |
555 | | -42, -45, -34, -12, 13, 34, 45, 41, 25, 1, -23, -40, -45, -36, -15, 10, |
556 | | 32, 44, 43, 28, 4, -20, -39, -45, -38, -18, 7, 30, 43, 44, 30, 8, |
557 | | -17, -37, -45, -39, -21, 3, 27, 42, 44, 33, 11, -14, -35, -45, -41, -24, |
558 | | }, { |
559 | | 32, 37, 15, -12, -35, -45, -39, -18, 9, 33, 45, 40, 21, -6, -30, -44, |
560 | | -42, -24, 2, 28, 43, 43, 27, 1, -25, -42, -44, -30, -4, 22, 41, 45, |
561 | | 32, 8, -19, -39, -45, -34, -11, 16, 38, 45, 36, 14, -13, -36, -45, -38, |
562 | | -17, 10, 34, 45, 40, 20, -7, -31, -44, -41, -23, 3, 29, 44, 43, 26, |
563 | | }, { |
564 | | 32, 36, 11, -18, -40, -45, -30, -3, 25, 43, 43, 24, -4, -31, -45, -39, |
565 | | -17, 12, 36, 45, 35, 10, -19, -40, -44, -30, -2, 26, 43, 42, 23, -6, |
566 | | -32, -45, -39, -16, 13, 37, 45, 34, 9, -20, -41, -44, -29, -1, 27, 44, |
567 | | 42, 22, -7, -33, -45, -38, -15, 14, 38, 45, 34, 8, -21, -41, -44, -28, |
568 | | }, { |
569 | | 32, 34, 7, -24, -43, -41, -19, 12, 38, 45, 30, 1, -29, -45, -39, -14, |
570 | | 17, 40, 44, 26, -4, -33, -45, -36, -9, 22, 43, 42, 21, -10, -36, -45, |
571 | | -32, -3, 27, 44, 40, 16, -15, -39, -44, -28, 2, 31, 45, 37, 11, -20, |
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780 | | 42, -45, 43, -34, 21, -6, -11, 26, -38, 44, -45, 39, -29, 14, 2, -18, |
781 | | 32, -41, 45, -43, 35, -22, 7, 10, -25, 37, -44, 45, -40, 30, -15, -1, |
782 | | 17, -31, 41, -45, 43, -36, 23, -8, -9, 24, -36, 44, -45, 40, -30, 16, |
783 | | }, { |
784 | | 32, -43, 36, -26, 13, 1, -15, 28, -38, 44, -45, 42, -35, 24, -11, -3, |
785 | | 17, -30, 39, -44, 45, -41, 34, -22, 9, 6, -19, 31, -40, 45, -45, 40, |
786 | | -32, 20, -7, -8, 21, -33, 41, -45, 44, -39, 30, -18, 4, 10, -23, 34, |
787 | | -42, 45, -44, 38, -29, 16, -2, -12, 25, -36, 43, -45, 43, -37, 27, -14, |
788 | | }, { |
789 | | 32, -44, 39, -31, 21, -10, -2, 14, -25, 34, -41, 45, -45, 42, -36, 28, |
790 | | -17, 6, 7, -18, 29, -37, 43, -45, 44, -40, 34, -24, 13, -1, -11, 22, |
791 | | -32, 39, -44, 45, -43, 38, -30, 20, -9, -3, 15, -26, 35, -41, 45, -45, |
792 | | 42, -36, 27, -16, 4, 8, -19, 30, -38, 43, -45, 44, -40, 33, -23, 12, |
793 | | }, { |
794 | | 32, -44, 41, -36, 29, -20, 11, -1, -9, 18, -27, 34, -40, 44, -45, 45, |
795 | | -42, 37, -30, 22, -13, 3, 7, -16, 25, -33, 39, -43, 45, -45, 43, -38, |
796 | | 32, -24, 15, -6, -4, 14, -23, 31, -38, 42, -45, 45, -43, 39, -34, 26, |
797 | | -17, 8, 2, -12, 21, -30, 36, -41, 44, -45, 44, -40, 35, -28, 19, -10, |
798 | | }, { |
799 | | 32, -45, 43, -39, 35, -30, 23, -16, 9, -1, -7, 14, -21, 28, -34, 38, |
800 | | -42, 44, -45, 45, -43, 40, -36, 31, -25, 18, -11, 3, 4, -12, 19, -26, |
801 | | 32, -37, 41, -44, 45, -45, 44, -41, 38, -33, 27, -20, 13, -6, -2, 10, |
802 | | -17, 24, -30, 36, -40, 43, -45, 45, -44, 42, -39, 34, -29, 22, -15, 8, |
803 | | }, { |
804 | | 32, -45, 44, -42, 40, -37, 34, -30, 25, -20, 15, -10, 4, 1, -7, 12, |
805 | | -17, 22, -27, 31, -35, 38, -41, 43, -44, 45, -45, 45, -43, 41, -39, 36, |
806 | | -32, 28, -23, 18, -13, 8, -2, -3, 9, -14, 19, -24, 29, -33, 36, -39, |
807 | | 42, -44, 45, -45, 45, -44, 43, -40, 38, -34, 30, -26, 21, -16, 11, -6, |
808 | | }, { |
809 | | 32, -45, 45, -44, 43, -42, 41, -39, 38, -36, 34, -31, 29, -26, 23, -20, |
810 | | 17, -14, 11, -8, 4, -1, -2, 6, -9, 12, -15, 18, -21, 24, -27, 30, |
811 | | -32, 34, -36, 38, -40, 41, -43, 44, -44, 45, -45, 45, -45, 45, -44, 43, |
812 | | -42, 40, -39, 37, -35, 33, -30, 28, -25, 22, -19, 16, -13, 10, -7, 3, |
813 | | }, { |
814 | | 32, -45, 45, -45, 45, -45, 45, -45, 44, -44, 44, -44, 43, -43, 43, -42, |
815 | | 42, -41, 41, -40, 40, -39, 39, -38, 38, -37, 36, -36, 35, -34, 34, -33, |
816 | | 32, -31, 30, -30, 29, -28, 27, -26, 25, -24, 23, -22, 21, -20, 19, -18, |
817 | | 17, -16, 15, -14, 13, -12, 11, -10, 9, -8, 7, -6, 4, -3, 2, -1, |
818 | | } |
819 | | }; |
820 | | |
821 | | struct H274HashContext { |
822 | | int type; |
823 | | struct AVMD5 *ctx; |
824 | | |
825 | | #if HAVE_BIGENDIAN |
826 | | BswapDSPContext bdsp; |
827 | | uint8_t *buf; |
828 | | int buf_size; |
829 | | #endif |
830 | | }; |
831 | | |
832 | | static av_always_inline void bswap16_buf_if_be(H274HashContext *s, const int ps, const uint8_t **src, const int w) |
833 | 8 | { |
834 | | #if HAVE_BIGENDIAN |
835 | | if (ps) { |
836 | | s->bdsp.bswap16_buf((uint16_t *)s->buf, |
837 | | (const uint16_t *)*src, w); |
838 | | *src = s->buf; |
839 | | } |
840 | | #endif |
841 | 8 | } |
842 | | |
843 | | static int verify_plane_md5(H274HashContext *s, |
844 | | const uint8_t *_src, const int w, const int h, const int stride, |
845 | | const int ps, const uint8_t *expected) |
846 | 1 | { |
847 | 1 | #define MD5_SIZE 16 |
848 | 1 | struct AVMD5 *ctx = s->ctx; |
849 | 1 | uint8_t md5[MD5_SIZE]; |
850 | | |
851 | 1 | av_md5_init(ctx); |
852 | 9 | for (int j = 0; j < h; j++) { |
853 | 8 | const uint8_t *src = &_src[j * stride]; |
854 | 8 | bswap16_buf_if_be(s, ps, &src, w); |
855 | 8 | av_md5_update(ctx, src, w << ps); |
856 | 8 | src += stride; |
857 | 8 | } |
858 | 1 | av_md5_final(ctx, md5); |
859 | | |
860 | 1 | if (memcmp(md5, expected, MD5_SIZE)) |
861 | 1 | return AVERROR_INVALIDDATA; |
862 | | |
863 | 0 | return 0; |
864 | 1 | } |
865 | | |
866 | | static int verify_plane_crc(H274HashContext *s, const uint8_t *_src, const int w, const int h, const int stride, |
867 | | const int ps, uint16_t expected) |
868 | 0 | { |
869 | 0 | uint32_t crc = 0x0F1D; // CRC-16-CCITT-AUG |
870 | 0 | const AVCRC *ctx = av_crc_get_table(AV_CRC_16_CCITT); |
871 | |
|
872 | 0 | for (int j = 0; j < h; j++) { |
873 | 0 | const uint8_t *src = &_src[j * stride]; |
874 | 0 | bswap16_buf_if_be(s, ps, &src, w); |
875 | 0 | crc = av_crc(ctx, crc, src, w << ps); |
876 | 0 | src += stride; |
877 | 0 | } |
878 | 0 | crc = av_bswap16(crc); |
879 | |
|
880 | 0 | if (crc != expected) |
881 | 0 | return AVERROR_INVALIDDATA; |
882 | | |
883 | 0 | return 0; |
884 | 0 | } |
885 | | |
886 | 0 | #define CAL_CHECKSUM(pixel) ((pixel) ^ xor_mask) |
887 | | static int verify_plane_checksum(const uint8_t *src, const int w, const int h, const int stride, const int ps, |
888 | | uint32_t expected) |
889 | 0 | { |
890 | 0 | uint32_t checksum = 0; |
891 | 0 | expected = av_le2ne32(expected); |
892 | |
|
893 | 0 | for (int y = 0; y < h; y++) { |
894 | 0 | for (int x = 0; x < w; x++) { |
895 | 0 | const int xor_mask = (x & 0xFF) ^ (y & 0xFF) ^ (x >> 8) ^ (y >> 8); |
896 | 0 | checksum += CAL_CHECKSUM(src[x << ps]); |
897 | 0 | if (ps) |
898 | 0 | checksum += CAL_CHECKSUM(src[(x << ps) + 1]); |
899 | 0 | } |
900 | 0 | src += stride; |
901 | 0 | } |
902 | |
|
903 | 0 | if (checksum != expected) |
904 | 0 | return AVERROR_INVALIDDATA; |
905 | | |
906 | 0 | return 0; |
907 | 0 | } |
908 | | |
909 | | enum { |
910 | | HASH_MD5SUM, |
911 | | HASH_CRC, |
912 | | HASH_CHECKSUM, |
913 | | HASH_LAST = HASH_CHECKSUM, |
914 | | }; |
915 | | |
916 | | void ff_h274_hash_freep(H274HashContext **ctx) |
917 | 15.4k | { |
918 | 15.4k | if (*ctx) { |
919 | 1 | H274HashContext *c = *ctx; |
920 | 1 | if (c->ctx) |
921 | 1 | av_free(c->ctx); |
922 | 1 | av_freep(ctx); |
923 | | #if HAVE_BIGENDIAN |
924 | | av_freep(&c->buf); |
925 | | #endif |
926 | 1 | } |
927 | 15.4k | } |
928 | | |
929 | | int ff_h274_hash_init(H274HashContext **ctx, const int type) |
930 | 1 | { |
931 | 1 | H274HashContext *c; |
932 | | |
933 | 1 | if (type > HASH_LAST || !ctx) |
934 | 0 | return AVERROR(EINVAL); |
935 | | |
936 | 1 | c = *ctx; |
937 | 1 | if (c) { |
938 | 0 | if (c->type != type) { |
939 | 0 | if (c->type == HASH_MD5SUM) |
940 | 0 | av_freep(&c->ctx); |
941 | 0 | c->type = type; |
942 | 0 | } |
943 | 1 | } else { |
944 | 1 | c = av_mallocz(sizeof(H274HashContext)); |
945 | 1 | if (!c) |
946 | 0 | return AVERROR(ENOMEM); |
947 | 1 | c->type = type; |
948 | 1 | *ctx = c; |
949 | 1 | } |
950 | | |
951 | 1 | if (type == HASH_MD5SUM && !c->ctx) { |
952 | 1 | c->ctx = av_md5_alloc(); |
953 | 1 | if (!c->ctx) |
954 | 0 | return AVERROR(ENOMEM); |
955 | 1 | } |
956 | | |
957 | | #if HAVE_BIGENDIAN |
958 | | ff_bswapdsp_init(&c->bdsp); |
959 | | #endif |
960 | | |
961 | 1 | return 0; |
962 | 1 | } |
963 | | |
964 | | int ff_h274_hash_verify(H274HashContext *c, const H274SEIPictureHash *hash, |
965 | | const AVFrame *frame, const int coded_width, const int coded_height) |
966 | 1 | { |
967 | 1 | const AVPixFmtDescriptor *desc; |
968 | 1 | int err = 0; |
969 | | |
970 | 1 | if (!c || !hash || !frame) |
971 | 0 | return AVERROR(EINVAL); |
972 | | |
973 | 1 | if (c->type != hash->hash_type) |
974 | 0 | return AVERROR(EINVAL); |
975 | | |
976 | 1 | desc = av_pix_fmt_desc_get(frame->format); |
977 | 1 | if (!desc) |
978 | 0 | return AVERROR(EINVAL); |
979 | | |
980 | 1 | for (int i = 0; i < desc->nb_components; i++) { |
981 | 1 | const int w = i ? (coded_width >> desc->log2_chroma_w) : coded_width; |
982 | 1 | const int h = i ? (coded_height >> desc->log2_chroma_h) : coded_height; |
983 | 1 | const int ps = desc->comp[i].step - 1; |
984 | 1 | const uint8_t *src = frame->data[i]; |
985 | 1 | const int stride = frame->linesize[i]; |
986 | | |
987 | | #if HAVE_BIGENDIAN |
988 | | if (c->type != HASH_CHECKSUM) { |
989 | | if (ps) { |
990 | | av_fast_malloc(&c->buf, &c->buf_size, |
991 | | FFMAX3(frame->linesize[0], frame->linesize[1], |
992 | | frame->linesize[2])); |
993 | | if (!c->buf) |
994 | | return AVERROR(ENOMEM); |
995 | | } |
996 | | } |
997 | | #endif |
998 | | |
999 | 1 | if (c->type == HASH_MD5SUM) |
1000 | 1 | err = verify_plane_md5(c, src, w, h, stride, ps, hash->md5[i]); |
1001 | 0 | else if (c->type == HASH_CRC) |
1002 | 0 | err = verify_plane_crc(c, src, w, h, stride, ps, hash->crc[i]); |
1003 | 0 | else if (c->type == HASH_CHECKSUM) |
1004 | 0 | err = verify_plane_checksum(src, w, h, stride, ps, hash->checksum[i]); |
1005 | 1 | if (err < 0) |
1006 | 1 | goto fail; |
1007 | 1 | } |
1008 | | |
1009 | 1 | fail: |
1010 | 1 | return err; |
1011 | 1 | } |