AOMedia AV1 Codec: av1/encoder/intra_mode_search_utils.h Source File

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intra_mode_search_utils.h
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1/*
2 * Copyright (c) 2020, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
17#ifndef AOM_AV1_ENCODER_INTRA_MODE_SEARCH_UTILS_H_
18#define AOM_AV1_ENCODER_INTRA_MODE_SEARCH_UTILS_H_
19
20#include "av1/common/enums.h"
21#include "av1/common/pred_common.h"
22#include "av1/common/reconintra.h"
23
24#include "av1/encoder/encoder.h"
25#include "av1/encoder/encodeframe.h"
26#include "av1/encoder/model_rd.h"
27#include "av1/encoder/palette.h"
28#include "av1/encoder/hybrid_fwd_txfm.h"
29
30#ifdef __cplusplus
31extern "C" {
32#endif
33
35// Macro for computing the speed-preset dependent threshold which is used for
36// deciding whether to enable/disable variance calculations in
37// intra_rd_variance_factor().
38#define INTRA_RD_VAR_THRESH(X) (1.0 - (0.25 * (X)))
39
40#define BINS 32
41static const float av1_intra_hog_model_bias[DIRECTIONAL_MODES] = {
42 0.450578f, 0.695518f, -0.717944f, -0.639894f,
43 -0.602019f, -0.453454f, 0.055857f, -0.465480f,
44};
45
46static const float av1_intra_hog_model_weights[BINS * DIRECTIONAL_MODES] = {
47 -3.076402f, -3.757063f, -3.275266f, -3.180665f, -3.452105f, -3.216593f,
48 -2.871212f, -3.134296f, -1.822324f, -2.401411f, -1.541016f, -1.195322f,
49 -0.434156f, 0.322868f, 2.260546f, 3.368715f, 3.989290f, 3.308487f,
50 2.277893f, 0.923793f, 0.026412f, -0.385174f, -0.718622f, -1.408867f,
51 -1.050558f, -2.323941f, -2.225827f, -2.585453f, -3.054283f, -2.875087f,
52 -2.985709f, -3.447155f, 3.758139f, 3.204353f, 2.170998f, 0.826587f,
53 -0.269665f, -0.702068f, -1.085776f, -2.175249f, -1.623180f, -2.975142f,
54 -2.779629f, -3.190799f, -3.521900f, -3.375480f, -3.319355f, -3.897389f,
55 -3.172334f, -3.594528f, -2.879132f, -2.547777f, -2.921023f, -2.281844f,
56 -1.818988f, -2.041771f, -0.618268f, -1.396458f, -0.567153f, -0.285868f,
57 -0.088058f, 0.753494f, 2.092413f, 3.215266f, -3.300277f, -2.748658f,
58 -2.315784f, -2.423671f, -2.257283f, -2.269583f, -2.196660f, -2.301076f,
59 -2.646516f, -2.271319f, -2.254366f, -2.300102f, -2.217960f, -2.473300f,
60 -2.116866f, -2.528246f, -3.314712f, -1.701010f, -0.589040f, -0.088077f,
61 0.813112f, 1.702213f, 2.653045f, 3.351749f, 3.243554f, 3.199409f,
62 2.437856f, 1.468854f, 0.533039f, -0.099065f, -0.622643f, -2.200732f,
63 -4.228861f, -2.875263f, -1.273956f, -0.433280f, 0.803771f, 1.975043f,
64 3.179528f, 3.939064f, 3.454379f, 3.689386f, 3.116411f, 1.970991f,
65 0.798406f, -0.628514f, -1.252546f, -2.825176f, -4.090178f, -3.777448f,
66 -3.227314f, -3.479403f, -3.320569f, -3.159372f, -2.729202f, -2.722341f,
67 -3.054913f, -2.742923f, -2.612703f, -2.662632f, -2.907314f, -3.117794f,
68 -3.102660f, -3.970972f, -4.891357f, -3.935582f, -3.347758f, -2.721924f,
69 -2.219011f, -1.702391f, -0.866529f, -0.153743f, 0.107733f, 1.416882f,
70 2.572884f, 3.607755f, 3.974820f, 3.997783f, 2.970459f, 0.791687f,
71 -1.478921f, -1.228154f, -1.216955f, -1.765932f, -1.951003f, -1.985301f,
72 -1.975881f, -1.985593f, -2.422371f, -2.419978f, -2.531288f, -2.951853f,
73 -3.071380f, -3.277027f, -3.373539f, -4.462010f, -0.967888f, 0.805524f,
74 2.794130f, 3.685984f, 3.745195f, 3.252444f, 2.316108f, 1.399146f,
75 -0.136519f, -0.162811f, -1.004357f, -1.667911f, -1.964662f, -2.937579f,
76 -3.019533f, -3.942766f, -5.102767f, -3.882073f, -3.532027f, -3.451956f,
77 -2.944015f, -2.643064f, -2.529872f, -2.077290f, -2.809965f, -1.803734f,
78 -1.783593f, -1.662585f, -1.415484f, -1.392673f, -0.788794f, -1.204819f,
79 -1.998864f, -1.182102f, -0.892110f, -1.317415f, -1.359112f, -1.522867f,
80 -1.468552f, -1.779072f, -2.332959f, -2.160346f, -2.329387f, -2.631259f,
81 -2.744936f, -3.052494f, -2.787363f, -3.442548f, -4.245075f, -3.032172f,
82 -2.061609f, -1.768116f, -1.286072f, -0.706587f, -0.192413f, 0.386938f,
83 0.716997f, 1.481393f, 2.216702f, 2.737986f, 3.109809f, 3.226084f,
84 2.490098f, -0.095827f, -3.864816f, -3.507248f, -3.128925f, -2.908251f,
85 -2.883836f, -2.881411f, -2.524377f, -2.624478f, -2.399573f, -2.367718f,
86 -1.918255f, -1.926277f, -1.694584f, -1.723790f, -0.966491f, -1.183115f,
87 -1.430687f, 0.872896f, 2.766550f, 3.610080f, 3.578041f, 3.334928f,
88 2.586680f, 1.895721f, 1.122195f, 0.488519f, -0.140689f, -0.799076f,
89 -1.222860f, -1.502437f, -1.900969f, -3.206816f,
90};
91
92static const NN_CONFIG av1_intra_hog_model_nnconfig = {
93 BINS, // num_inputs
94 DIRECTIONAL_MODES, // num_outputs
95 0, // num_hidden_layers
96 { 0 },
97 {
98 av1_intra_hog_model_weights,
99 },
100 {
101 av1_intra_hog_model_bias,
102 },
103};
104
105#define FIX_PREC_BITS (16)
106static AOM_INLINE int get_hist_bin_idx(int dx, int dy) {
107 const int32_t ratio = (dy * (1 << FIX_PREC_BITS)) / dx;
108
109 // Find index by bisection
110 static const int thresholds[BINS] = {
111 -1334015, -441798, -261605, -183158, -138560, -109331, -88359, -72303,
112 -59392, -48579, -39272, -30982, -23445, -16400, -9715, -3194,
113 3227, 9748, 16433, 23478, 31015, 39305, 48611, 59425,
114 72336, 88392, 109364, 138593, 183191, 261638, 441831, INT32_MAX
115 };
116
117 int lo_idx = 0, hi_idx = BINS - 1;
118 // Divide into segments of size 8 gives better performance than binary search
119 // here.
120 if (ratio <= thresholds[7]) {
121 lo_idx = 0;
122 hi_idx = 7;
123 } else if (ratio <= thresholds[15]) {
124 lo_idx = 8;
125 hi_idx = 15;
126 } else if (ratio <= thresholds[23]) {
127 lo_idx = 16;
128 hi_idx = 23;
129 } else {
130 lo_idx = 24;
131 hi_idx = 31;
132 }
133
134 for (int idx = lo_idx; idx <= hi_idx; idx++) {
135 if (ratio <= thresholds[idx]) {
136 return idx;
137 }
138 }
139 assert(0 && "No valid histogram bin found!");
140 return BINS - 1;
141}
142#undef FIX_PREC_BITS
143
144// Normalizes the hog data.
145static AOM_INLINE void normalize_hog(float total, float *hist) {
146 for (int i = 0; i < BINS; ++i) hist[i] /= total;
147}
148
149static AOM_INLINE void lowbd_generate_hog(const uint8_t *src, int stride,
150 int rows, int cols, float *hist) {
151 float total = 0.1f;
152 src += stride;
153 for (int r = 1; r < rows - 1; ++r) {
154 for (int c = 1; c < cols - 1; ++c) {
155 const uint8_t *above = &src[c - stride];
156 const uint8_t *below = &src[c + stride];
157 const uint8_t *left = &src[c - 1];
158 const uint8_t *right = &src[c + 1];
159 // Calculate gradient using Sobel filters.
160 const int dx = (right[-stride] + 2 * right[0] + right[stride]) -
161 (left[-stride] + 2 * left[0] + left[stride]);
162 const int dy = (below[-1] + 2 * below[0] + below[1]) -
163 (above[-1] + 2 * above[0] + above[1]);
164 if (dx == 0 && dy == 0) continue;
165 const int temp = abs(dx) + abs(dy);
166 if (!temp) continue;
167 total += temp;
168 if (dx == 0) {
169 hist[0] += temp / 2;
170 hist[BINS - 1] += temp / 2;
171 } else {
172 const int idx = get_hist_bin_idx(dx, dy);
173 assert(idx >= 0 && idx < BINS);
174 hist[idx] += temp;
175 }
176 }
177 src += stride;
178 }
179
180 normalize_hog(total, hist);
181}
182
183// Computes and stores pixel level gradient information of a given superblock
184// for LBD encode.
185static AOM_INLINE void lowbd_compute_gradient_info_sb(MACROBLOCK *const x,
186 BLOCK_SIZE sb_size,
187 PLANE_TYPE plane) {
188 PixelLevelGradientInfo *const grad_info_sb =
189 x->pixel_gradient_info + plane * MAX_SB_SQUARE;
190 const uint8_t *src = x->plane[plane].src.buf;
191 const int stride = x->plane[plane].src.stride;
192 const int ss_x = x->e_mbd.plane[plane].subsampling_x;
193 const int ss_y = x->e_mbd.plane[plane].subsampling_y;
194 const int sb_height = block_size_high[sb_size] >> ss_y;
195 const int sb_width = block_size_wide[sb_size] >> ss_x;
196 src += stride;
197 for (int r = 1; r < sb_height - 1; ++r) {
198 for (int c = 1; c < sb_width - 1; ++c) {
199 const uint8_t *above = &src[c - stride];
200 const uint8_t *below = &src[c + stride];
201 const uint8_t *left = &src[c - 1];
202 const uint8_t *right = &src[c + 1];
203 // Calculate gradient using Sobel filters.
204 const int dx = (right[-stride] + 2 * right[0] + right[stride]) -
205 (left[-stride] + 2 * left[0] + left[stride]);
206 const int dy = (below[-1] + 2 * below[0] + below[1]) -
207 (above[-1] + 2 * above[0] + above[1]);
208 grad_info_sb[r * sb_width + c].is_dx_zero = (dx == 0);
209 grad_info_sb[r * sb_width + c].abs_dx_abs_dy_sum =
210 (uint16_t)(abs(dx) + abs(dy));
211 grad_info_sb[r * sb_width + c].hist_bin_idx =
212 (dx != 0) ? get_hist_bin_idx(dx, dy) : -1;
213 }
214 src += stride;
215 }
216}
217
218#if CONFIG_AV1_HIGHBITDEPTH
219static AOM_INLINE void highbd_generate_hog(const uint8_t *src8, int stride,
220 int rows, int cols, float *hist) {
221 float total = 0.1f;
222 const uint16_t *src = CONVERT_TO_SHORTPTR(src8);
223 src += stride;
224 for (int r = 1; r < rows - 1; ++r) {
225 for (int c = 1; c < cols - 1; ++c) {
226 const uint16_t *above = &src[c - stride];
227 const uint16_t *below = &src[c + stride];
228 const uint16_t *left = &src[c - 1];
229 const uint16_t *right = &src[c + 1];
230 // Calculate gradient using Sobel filters.
231 const int dx = (right[-stride] + 2 * right[0] + right[stride]) -
232 (left[-stride] + 2 * left[0] + left[stride]);
233 const int dy = (below[-1] + 2 * below[0] + below[1]) -
234 (above[-1] + 2 * above[0] + above[1]);
235 if (dx == 0 && dy == 0) continue;
236 const int temp = abs(dx) + abs(dy);
237 if (!temp) continue;
238 total += temp;
239 if (dx == 0) {
240 hist[0] += temp / 2;
241 hist[BINS - 1] += temp / 2;
242 } else {
243 const int idx = get_hist_bin_idx(dx, dy);
244 assert(idx >= 0 && idx < BINS);
245 hist[idx] += temp;
246 }
247 }
248 src += stride;
249 }
250
251 normalize_hog(total, hist);
252}
253
254// Computes and stores pixel level gradient information of a given superblock
255// for HBD encode.
256static AOM_INLINE void highbd_compute_gradient_info_sb(MACROBLOCK *const x,
257 BLOCK_SIZE sb_size,
258 PLANE_TYPE plane) {
259 PixelLevelGradientInfo *const grad_info_sb =
260 x->pixel_gradient_info + plane * MAX_SB_SQUARE;
261 const uint16_t *src = CONVERT_TO_SHORTPTR(x->plane[plane].src.buf);
262 const int stride = x->plane[plane].src.stride;
263 const int ss_x = x->e_mbd.plane[plane].subsampling_x;
264 const int ss_y = x->e_mbd.plane[plane].subsampling_y;
265 const int sb_height = block_size_high[sb_size] >> ss_y;
266 const int sb_width = block_size_wide[sb_size] >> ss_x;
267 src += stride;
268 for (int r = 1; r < sb_height - 1; ++r) {
269 for (int c = 1; c < sb_width - 1; ++c) {
270 const uint16_t *above = &src[c - stride];
271 const uint16_t *below = &src[c + stride];
272 const uint16_t *left = &src[c - 1];
273 const uint16_t *right = &src[c + 1];
274 // Calculate gradient using Sobel filters.
275 const int dx = (right[-stride] + 2 * right[0] + right[stride]) -
276 (left[-stride] + 2 * left[0] + left[stride]);
277 const int dy = (below[-1] + 2 * below[0] + below[1]) -
278 (above[-1] + 2 * above[0] + above[1]);
279 grad_info_sb[r * sb_width + c].is_dx_zero = (dx == 0);
280 grad_info_sb[r * sb_width + c].abs_dx_abs_dy_sum =
281 (uint16_t)(abs(dx) + abs(dy));
282 grad_info_sb[r * sb_width + c].hist_bin_idx =
283 (dx != 0) ? get_hist_bin_idx(dx, dy) : -1;
284 }
285 src += stride;
286 }
287}
288#endif // CONFIG_AV1_HIGHBITDEPTH
289
290static AOM_INLINE void generate_hog(const uint8_t *src8, int stride, int rows,
291 int cols, float *hist, int highbd) {
292#if CONFIG_AV1_HIGHBITDEPTH
293 if (highbd) {
294 highbd_generate_hog(src8, stride, rows, cols, hist);
295 return;
296 }
297#else
298 (void)highbd;
299#endif // CONFIG_AV1_HIGHBITDEPTH
300 lowbd_generate_hog(src8, stride, rows, cols, hist);
301}
302
303static AOM_INLINE void compute_gradient_info_sb(MACROBLOCK *const x,
304 BLOCK_SIZE sb_size,
305 PLANE_TYPE plane) {
306#if CONFIG_AV1_HIGHBITDEPTH
307 if (is_cur_buf_hbd(&x->e_mbd)) {
308 highbd_compute_gradient_info_sb(x, sb_size, plane);
309 return;
310 }
311#endif // CONFIG_AV1_HIGHBITDEPTH
312 lowbd_compute_gradient_info_sb(x, sb_size, plane);
313}
314
315// Gradient caching at superblock level is allowed only if all of the following
316// conditions are satisfied:
317// (1) The current frame is an intra only frame
318// (2) Non-RD mode decisions are not enabled
319// (3) The sf partition_search_type is set to SEARCH_PARTITION
320// (4) Either intra_pruning_with_hog or chroma_intra_pruning_with_hog is enabled
321//
322// SB level caching of gradient data may not help in speedup for the following
323// cases:
324// (1) Inter frames (due to early intra gating)
325// (2) When partition_search_type is not SEARCH_PARTITION
326// Hence, gradient data is computed at block level in such cases.
327static AOM_INLINE bool is_gradient_caching_for_hog_enabled(
328 const AV1_COMP *const cpi) {
329 const SPEED_FEATURES *const sf = &cpi->sf;
330 return frame_is_intra_only(&cpi->common) && !sf->rt_sf.use_nonrd_pick_mode &&
331 (sf->part_sf.partition_search_type == SEARCH_PARTITION) &&
332 (sf->intra_sf.intra_pruning_with_hog ||
333 sf->intra_sf.chroma_intra_pruning_with_hog);
334}
335
336// Function to generate pixel level gradient information for a given superblock.
337// Sets the flags 'is_sb_gradient_cached' for the specific plane-type if
338// gradient info is generated for the same.
339static AOM_INLINE void produce_gradients_for_sb(AV1_COMP *cpi, MACROBLOCK *x,
340 BLOCK_SIZE sb_size, int mi_row,
341 int mi_col) {
342 // Initialise flags related to hog data caching.
343 x->is_sb_gradient_cached[PLANE_TYPE_Y] = false;
344 x->is_sb_gradient_cached[PLANE_TYPE_UV] = false;
345 if (!is_gradient_caching_for_hog_enabled(cpi)) return;
346
347 const SPEED_FEATURES *sf = &cpi->sf;
348 const int num_planes = av1_num_planes(&cpi->common);
349
350 av1_setup_src_planes(x, cpi->source, mi_row, mi_col, num_planes, sb_size);
351
352 if (sf->intra_sf.intra_pruning_with_hog) {
353 compute_gradient_info_sb(x, sb_size, PLANE_TYPE_Y);
354 x->is_sb_gradient_cached[PLANE_TYPE_Y] = true;
355 }
356 if (sf->intra_sf.chroma_intra_pruning_with_hog && num_planes > 1) {
357 compute_gradient_info_sb(x, sb_size, PLANE_TYPE_UV);
358 x->is_sb_gradient_cached[PLANE_TYPE_UV] = true;
359 }
360}
361
362// Reuses the pixel level gradient data generated at superblock level for block
363// level histogram computation.
364static AOM_INLINE void generate_hog_using_gradient_cache(const MACROBLOCK *x,
365 int rows, int cols,
366 BLOCK_SIZE sb_size,
367 PLANE_TYPE plane,
368 float *hist) {
369 float total = 0.1f;
370 const int ss_x = x->e_mbd.plane[plane].subsampling_x;
371 const int ss_y = x->e_mbd.plane[plane].subsampling_y;
372 const int sb_width = block_size_wide[sb_size] >> ss_x;
373
374 // Derive the offset from the starting of the superblock in order to locate
375 // the block level gradient data in the cache.
376 const int mi_row_in_sb = x->e_mbd.mi_row & (mi_size_high[sb_size] - 1);
377 const int mi_col_in_sb = x->e_mbd.mi_col & (mi_size_wide[sb_size] - 1);
378 const int block_offset_in_grad_cache =
379 sb_width * (mi_row_in_sb << (MI_SIZE_LOG2 - ss_y)) +
380 (mi_col_in_sb << (MI_SIZE_LOG2 - ss_x));
381 const PixelLevelGradientInfo *grad_info_blk = x->pixel_gradient_info +
382 plane * MAX_SB_SQUARE +
383 block_offset_in_grad_cache;
384
385 // Retrieve the cached gradient information and generate the histogram.
386 for (int r = 1; r < rows - 1; ++r) {
387 for (int c = 1; c < cols - 1; ++c) {
388 const uint16_t abs_dx_abs_dy_sum =
389 grad_info_blk[r * sb_width + c].abs_dx_abs_dy_sum;
390 if (!abs_dx_abs_dy_sum) continue;
391 total += abs_dx_abs_dy_sum;
392 const bool is_dx_zero = grad_info_blk[r * sb_width + c].is_dx_zero;
393 if (is_dx_zero) {
394 hist[0] += abs_dx_abs_dy_sum >> 1;
395 hist[BINS - 1] += abs_dx_abs_dy_sum >> 1;
396 } else {
397 const int8_t idx = grad_info_blk[r * sb_width + c].hist_bin_idx;
398 assert(idx >= 0 && idx < BINS);
399 hist[idx] += abs_dx_abs_dy_sum;
400 }
401 }
402 }
403 normalize_hog(total, hist);
404}
405
406static INLINE void collect_hog_data(const MACROBLOCK *x, BLOCK_SIZE bsize,
407 BLOCK_SIZE sb_size, int plane, float *hog) {
408 const MACROBLOCKD *xd = &x->e_mbd;
409 const struct macroblockd_plane *const pd = &xd->plane[plane];
410 const int ss_x = pd->subsampling_x;
411 const int ss_y = pd->subsampling_y;
412 const int bh = block_size_high[bsize];
413 const int bw = block_size_wide[bsize];
414 const int rows =
415 ((xd->mb_to_bottom_edge >= 0) ? bh : (xd->mb_to_bottom_edge >> 3) + bh) >>
416 ss_y;
417 const int cols =
418 ((xd->mb_to_right_edge >= 0) ? bw : (xd->mb_to_right_edge >> 3) + bw) >>
419 ss_x;
420
421 // If gradient data is already generated at SB level, reuse the cached data.
422 // Otherwise, compute the data.
423 if (x->is_sb_gradient_cached[plane]) {
424 generate_hog_using_gradient_cache(x, rows, cols, sb_size, plane, hog);
425 } else {
426 const uint8_t *src = x->plane[plane].src.buf;
427 const int src_stride = x->plane[plane].src.stride;
428 generate_hog(src, src_stride, rows, cols, hog, is_cur_buf_hbd(xd));
429 }
430
431 // Scale the hog so the luma and chroma are on the same scale
432 for (int b = 0; b < BINS; ++b) {
433 hog[b] *= (1 + ss_x) * (1 + ss_y);
434 }
435}
436
437static AOM_INLINE void prune_intra_mode_with_hog(
438 const MACROBLOCK *x, BLOCK_SIZE bsize, BLOCK_SIZE sb_size, float th,
439 uint8_t *directional_mode_skip_mask, int is_chroma) {
440 const int plane = is_chroma ? AOM_PLANE_U : AOM_PLANE_Y;
441 float hist[BINS] = { 0.0f };
442 collect_hog_data(x, bsize, sb_size, plane, hist);
443
444 // Make prediction for each of the mode
445 float scores[DIRECTIONAL_MODES] = { 0.0f };
446 av1_nn_predict(hist, &av1_intra_hog_model_nnconfig, 1, scores);
447 for (UV_PREDICTION_MODE uv_mode = UV_V_PRED; uv_mode <= UV_D67_PRED;
448 uv_mode++) {
449 if (scores[uv_mode - UV_V_PRED] <= th) {
450 directional_mode_skip_mask[uv_mode] = 1;
451 }
452 }
453}
454#undef BINS
455
456int av1_calc_normalized_variance(aom_variance_fn_t vf, const uint8_t *const buf,
457 const int stride, const int is_hbd);
458
459// Returns whether caching of source variance for 4x4 sub-blocks is allowed.
460static AOM_INLINE bool is_src_var_for_4x4_sub_blocks_caching_enabled(
461 const AV1_COMP *const cpi) {
462 const SPEED_FEATURES *const sf = &cpi->sf;
463 if (cpi->oxcf.mode != ALLINTRA) return false;
464
465 if (sf->part_sf.partition_search_type == SEARCH_PARTITION) return true;
466
467 if (INTRA_RD_VAR_THRESH(cpi->oxcf.speed) <= 0 ||
468 (sf->rt_sf.use_nonrd_pick_mode && !sf->rt_sf.hybrid_intra_pickmode))
469 return false;
470
471 return true;
472}
473
474// Initialize the members of Block4x4VarInfo structure to -1 at the start
475// of every superblock.
476static AOM_INLINE void init_src_var_info_of_4x4_sub_blocks(
477 const AV1_COMP *const cpi, Block4x4VarInfo *src_var_info_of_4x4_sub_blocks,
478 const BLOCK_SIZE sb_size) {
479 if (!is_src_var_for_4x4_sub_blocks_caching_enabled(cpi)) return;
480
481 const int mi_count_in_sb = mi_size_wide[sb_size] * mi_size_high[sb_size];
482 for (int i = 0; i < mi_count_in_sb; i++) {
483 src_var_info_of_4x4_sub_blocks[i].var = -1;
484 src_var_info_of_4x4_sub_blocks[i].log_var = -1.0;
485 }
486}
487
488// Returns the cost needed to send a uniformly distributed r.v.
489static AOM_INLINE int write_uniform_cost(int n, int v) {
490 const int l = get_unsigned_bits(n);
491 const int m = (1 << l) - n;
492 if (l == 0) return 0;
493 if (v < m)
494 return av1_cost_literal(l - 1);
495 else
496 return av1_cost_literal(l);
497}
504 static AOM_INLINE int intra_mode_info_cost_y(const AV1_COMP *cpi,
505 const MACROBLOCK *x,
506 const MB_MODE_INFO *mbmi,
507 BLOCK_SIZE bsize, int mode_cost,
508 int discount_color_cost) {
509 int total_rate = mode_cost;
510 const ModeCosts *mode_costs = &x->mode_costs;
511 const int use_palette = mbmi->palette_mode_info.palette_size[0] > 0;
512 const int use_filter_intra = mbmi->filter_intra_mode_info.use_filter_intra;
513 const int use_intrabc = mbmi->use_intrabc;
514 // Can only activate one mode.
515 assert(((mbmi->mode != DC_PRED) + use_palette + use_intrabc +
516 use_filter_intra) <= 1);
517 const int try_palette = av1_allow_palette(
518 cpi->common.features.allow_screen_content_tools, mbmi->bsize);
519 if (try_palette && mbmi->mode == DC_PRED) {
520 const MACROBLOCKD *xd = &x->e_mbd;
521 const int bsize_ctx = av1_get_palette_bsize_ctx(bsize);
522 const int mode_ctx = av1_get_palette_mode_ctx(xd);
523 total_rate +=
524 mode_costs->palette_y_mode_cost[bsize_ctx][mode_ctx][use_palette];
525 if (use_palette) {
526 const uint8_t *const color_map = xd->plane[0].color_index_map;
527 int block_width, block_height, rows, cols;
528 av1_get_block_dimensions(bsize, 0, xd, &block_width, &block_height, &rows,
529 &cols);
530 const int plt_size = mbmi->palette_mode_info.palette_size[0];
531 int palette_mode_cost =
532 mode_costs
533 ->palette_y_size_cost[bsize_ctx][plt_size - PALETTE_MIN_SIZE] +
534 write_uniform_cost(plt_size, color_map[0]);
535 uint16_t color_cache[2 * PALETTE_MAX_SIZE];
536 const int n_cache = av1_get_palette_cache(xd, 0, color_cache);
537 palette_mode_cost +=
538 av1_palette_color_cost_y(&mbmi->palette_mode_info, color_cache,
539 n_cache, cpi->common.seq_params->bit_depth);
540 if (!discount_color_cost)
541 palette_mode_cost +=
542 av1_cost_color_map(x, 0, bsize, mbmi->tx_size, PALETTE_MAP);
543
544 total_rate += palette_mode_cost;
545 }
546 }
547 if (av1_filter_intra_allowed(&cpi->common, mbmi)) {
548 total_rate += mode_costs->filter_intra_cost[mbmi->bsize][use_filter_intra];
549 if (use_filter_intra) {
550 total_rate +=
551 mode_costs->filter_intra_mode_cost[mbmi->filter_intra_mode_info
552 .filter_intra_mode];
553 }
554 }
555 if (av1_is_directional_mode(mbmi->mode)) {
556 if (av1_use_angle_delta(bsize)) {
557 total_rate +=
558 mode_costs->angle_delta_cost[mbmi->mode - V_PRED]
559 [MAX_ANGLE_DELTA +
560 mbmi->angle_delta[PLANE_TYPE_Y]];
561 }
562 }
563 if (av1_allow_intrabc(&cpi->common))
564 total_rate += mode_costs->intrabc_cost[use_intrabc];
565 return total_rate;
566}
567
572 static AOM_INLINE int intra_mode_info_cost_uv(const AV1_COMP *cpi,
573 const MACROBLOCK *x,
574 const MB_MODE_INFO *mbmi,
575 BLOCK_SIZE bsize, int mode_cost) {
576 int total_rate = mode_cost;
577 const ModeCosts *mode_costs = &x->mode_costs;
578 const int use_palette = mbmi->palette_mode_info.palette_size[1] > 0;
579 const UV_PREDICTION_MODE uv_mode = mbmi->uv_mode;
580 // Can only activate one mode.
581 assert(((uv_mode != UV_DC_PRED) + use_palette + mbmi->use_intrabc) <= 1);
582
583 const int try_palette = av1_allow_palette(
584 cpi->common.features.allow_screen_content_tools, mbmi->bsize);
585 if (try_palette && uv_mode == UV_DC_PRED) {
586 const PALETTE_MODE_INFO *pmi = &mbmi->palette_mode_info;
587 total_rate +=
588 mode_costs->palette_uv_mode_cost[pmi->palette_size[0] > 0][use_palette];
589 if (use_palette) {
590 const int bsize_ctx = av1_get_palette_bsize_ctx(bsize);
591 const int plt_size = pmi->palette_size[1];
592 const MACROBLOCKD *xd = &x->e_mbd;
593 const uint8_t *const color_map = xd->plane[1].color_index_map;
594 int palette_mode_cost =
595 mode_costs
596 ->palette_uv_size_cost[bsize_ctx][plt_size - PALETTE_MIN_SIZE] +
597 write_uniform_cost(plt_size, color_map[0]);
598 uint16_t color_cache[2 * PALETTE_MAX_SIZE];
599 const int n_cache = av1_get_palette_cache(xd, 1, color_cache);
600 palette_mode_cost += av1_palette_color_cost_uv(
601 pmi, color_cache, n_cache, cpi->common.seq_params->bit_depth);
602 palette_mode_cost +=
603 av1_cost_color_map(x, 1, bsize, mbmi->tx_size, PALETTE_MAP);
604 total_rate += palette_mode_cost;
605 }
606 }
607 const PREDICTION_MODE intra_mode = get_uv_mode(uv_mode);
608 if (av1_is_directional_mode(intra_mode)) {
609 if (av1_use_angle_delta(bsize)) {
610 total_rate +=
611 mode_costs->angle_delta_cost[intra_mode - V_PRED]
612 [mbmi->angle_delta[PLANE_TYPE_UV] +
613 MAX_ANGLE_DELTA];
614 }
615 }
616 return total_rate;
617}
618
620// Makes a quick intra prediction and estimate the rdcost with a model without
621// going through the whole txfm/quantize/itxfm process.
622static int64_t intra_model_rd(const AV1_COMMON *cm, MACROBLOCK *const x,
623 int plane, BLOCK_SIZE plane_bsize,
624 TX_SIZE tx_size, int use_hadamard) {
625 MACROBLOCKD *const xd = &x->e_mbd;
626 const BitDepthInfo bd_info = get_bit_depth_info(xd);
627 int row, col;
628 assert(!is_inter_block(xd->mi[0]));
629 const int stepr = tx_size_high_unit[tx_size];
630 const int stepc = tx_size_wide_unit[tx_size];
631 const int txbw = tx_size_wide[tx_size];
632 const int txbh = tx_size_high[tx_size];
633 const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
634 const int max_blocks_high = max_block_high(xd, plane_bsize, plane);
635 int64_t satd_cost = 0;
636 struct macroblock_plane *p = &x->plane[plane];
637 struct macroblockd_plane *pd = &xd->plane[plane];
638 // Prediction.
639 for (row = 0; row < max_blocks_high; row += stepr) {
640 for (col = 0; col < max_blocks_wide; col += stepc) {
641 av1_predict_intra_block_facade(cm, xd, plane, col, row, tx_size);
642 // Here we use p->src_diff and p->coeff as temporary buffers for
643 // prediction residue and transform coefficients. The buffers are only
644 // used in this for loop, therefore we don't need to properly add offset
645 // to the buffers.
646 av1_subtract_block(
647 bd_info, txbh, txbw, p->src_diff, block_size_wide[plane_bsize],
648 p->src.buf + (((row * p->src.stride) + col) << 2), p->src.stride,
649 pd->dst.buf + (((row * pd->dst.stride) + col) << 2), pd->dst.stride);
650 av1_quick_txfm(use_hadamard, tx_size, bd_info, p->src_diff,
651 block_size_wide[plane_bsize], p->coeff);
652 satd_cost += aom_satd(p->coeff, tx_size_2d[tx_size]);
653 }
654 }
655 return satd_cost;
656}
669 static AOM_INLINE int model_intra_yrd_and_prune(const AV1_COMP *const cpi,
670 MACROBLOCK *x, BLOCK_SIZE bsize,
671 int64_t *best_model_rd) {
672 const TX_SIZE tx_size = AOMMIN(TX_32X32, max_txsize_lookup[bsize]);
673 const int plane = 0;
674 const AV1_COMMON *cm = &cpi->common;
675 const int64_t this_model_rd =
676 intra_model_rd(cm, x, plane, bsize, tx_size, /*use_hadamard=*/1);
677 if (*best_model_rd != INT64_MAX &&
678 this_model_rd > *best_model_rd + (*best_model_rd >> 2)) {
679 return 1;
680 } else if (this_model_rd < *best_model_rd) {
681 *best_model_rd = this_model_rd;
682 }
683 return 0;
684}
685
686#ifdef __cplusplus
687} // extern "C"
688#endif
689
690#endif // AOM_AV1_ENCODER_INTRA_MODE_SEARCH_UTILS_H_
AOM_PLANE_U
#define AOM_PLANE_U
Definition aom_image.h:209
AOM_PLANE_Y
#define AOM_PLANE_Y
Definition aom_image.h:208
encoder.h
Declares top-level encoder structures and functions.
enums.h
model_intra_yrd_and_prune
static int model_intra_yrd_and_prune(const AV1_COMP *const cpi, MACROBLOCK *x, BLOCK_SIZE bsize, int64_t *best_model_rd)
Estimate the luma rdcost of a given intra mode and try to prune it.
Definition intra_mode_search_utils.h:669
av1_palette_color_cost_y
int av1_palette_color_cost_y(const PALETTE_MODE_INFO *const pmi, const uint16_t *color_cache, int n_cache, int bit_depth)
Gets the rate cost for transmitting luma palette color values.
Definition palette.c:125
av1_palette_color_cost_uv
int av1_palette_color_cost_uv(const PALETTE_MODE_INFO *const pmi, const uint16_t *color_cache, int n_cache, int bit_depth)
Gets the rate cost for transmitting luma palette chroma values.
Definition palette.c:139
intra_mode_info_cost_uv
static int intra_mode_info_cost_uv(const AV1_COMP *cpi, const MACROBLOCK *x, const MB_MODE_INFO *mbmi, BLOCK_SIZE bsize, int mode_cost)
Return the rate cost for chroma prediction mode info of intra blocks.
Definition intra_mode_search_utils.h:572
intra_mode_info_cost_y
static int intra_mode_info_cost_y(const AV1_COMP *cpi, const MACROBLOCK *x, const MB_MODE_INFO *mbmi, BLOCK_SIZE bsize, int mode_cost, int discount_color_cost)
Returns the rate cost for luma prediction mode info of intra blocks.
Definition intra_mode_search_utils.h:504
palette.h
Declares functions used in palette search.
AV1Common
Top level common structure used by both encoder and decoder.
Definition av1_common_int.h:752
AV1Common::seq_params
SequenceHeader * seq_params
Definition av1_common_int.h:978
AV1Common::features
FeatureFlags features
Definition av1_common_int.h:907
AV1_COMP
Top level encoder structure.
Definition encoder.h:2872
AV1_COMP::sf
SPEED_FEATURES sf
Definition encoder.h:3099
AV1_COMP::oxcf
AV1EncoderConfig oxcf
Definition encoder.h:2920
AV1_COMP::common
AV1_COMMON common
Definition encoder.h:2915
AV1_COMP::source
YV12_BUFFER_CONFIG * source
Definition encoder.h:2933
FeatureFlags::allow_screen_content_tools
bool allow_screen_content_tools
Definition av1_common_int.h:377
MB_MODE_INFO
Stores the prediction/txfm mode of the current coding block.
Definition blockd.h:222
MB_MODE_INFO::mode
PREDICTION_MODE mode
The prediction mode used.
Definition blockd.h:232
MB_MODE_INFO::uv_mode
UV_PREDICTION_MODE uv_mode
The UV mode when intra is used.
Definition blockd.h:234
MB_MODE_INFO::palette_mode_info
PALETTE_MODE_INFO palette_mode_info
Stores the size and colors of palette mode.
Definition blockd.h:280
MB_MODE_INFO::angle_delta
int8_t angle_delta[PLANE_TYPES]
Directional mode delta: the angle is base angle + (angle_delta * step).
Definition blockd.h:272
MB_MODE_INFO::filter_intra_mode_info
FILTER_INTRA_MODE_INFO filter_intra_mode_info
The type of filter intra mode used (if applicable).
Definition blockd.h:274
MB_MODE_INFO::bsize
BLOCK_SIZE bsize
The block size of the current coding block.
Definition blockd.h:228
MB_MODE_INFO::tx_size
TX_SIZE tx_size
Transform size when fixed size txfm is used (e.g. intra modes).
Definition blockd.h:290
MB_MODE_INFO::use_intrabc
uint8_t use_intrabc
Whether intrabc is used.
Definition blockd.h:318
ModeCosts
Holds the entropy costs for various modes sent to the bitstream.
Definition block.h:579
ModeCosts::intrabc_cost
int intrabc_cost[2]
intrabc_cost
Definition block.h:614
ModeCosts::palette_uv_mode_cost
int palette_uv_mode_cost[2][2]
palette_uv_mode_cost
Definition block.h:629
ModeCosts::palette_y_size_cost
int palette_y_size_cost[7][PALETTE_SIZES]
palette_y_size_cost
Definition block.h:617
ModeCosts::palette_uv_size_cost
int palette_uv_size_cost[7][PALETTE_SIZES]
palette_uv_size_cost
Definition block.h:619
ModeCosts::filter_intra_cost
int filter_intra_cost[BLOCK_SIZES_ALL][2]
filter_intra_cost
Definition block.h:599
ModeCosts::filter_intra_mode_cost
int filter_intra_mode_cost[FILTER_INTRA_MODES]
filter_intra_mode_cost
Definition block.h:601
ModeCosts::angle_delta_cost
int angle_delta_cost[DIRECTIONAL_MODES][2 *MAX_ANGLE_DELTA+1]
angle_delta_cost
Definition block.h:603
ModeCosts::palette_y_mode_cost
int palette_y_mode_cost[7][3][2]
palette_y_mode_cost
Definition block.h:627
SPEED_FEATURES
Top level speed vs quality trade off data struture.
Definition speed_features.h:1869
SPEED_FEATURES::part_sf
PARTITION_SPEED_FEATURES part_sf
Definition speed_features.h:1893
SPEED_FEATURES::intra_sf
INTRA_MODE_SPEED_FEATURES intra_sf
Definition speed_features.h:1913
SPEED_FEATURES::rt_sf
REAL_TIME_SPEED_FEATURES rt_sf
Definition speed_features.h:1938
macroblock_plane
Each source plane of the current macroblock.
Definition block.h:129
macroblock_plane::src
struct buf_2d src
A buffer containing the source frame.
Definition block.h:143
macroblock_plane::coeff
tran_low_t * coeff
Transformed coefficients.
Definition block.h:137
macroblock_plane::src_diff
int16_t * src_diff
Stores source - pred so the txfm can be computed later.
Definition block.h:131
macroblock
Encoder's parameters related to the current coding block.
Definition block.h:878
macroblock::e_mbd
MACROBLOCKD e_mbd
Decoder's view of current coding block.
Definition block.h:896
macroblock::mode_costs
ModeCosts mode_costs
The rate needed to signal a mode to the bitstream.
Definition block.h:1012
macroblock::pixel_gradient_info
PixelLevelGradientInfo * pixel_gradient_info
Pointer to the buffer which caches gradient information.
Definition block.h:1259
macroblock::plane
struct macroblock_plane plane[3]
Each of the encoding plane.
Definition block.h:888
macroblock::is_sb_gradient_cached
bool is_sb_gradient_cached[PLANE_TYPES]
Flags indicating the availability of cached gradient info.
Definition block.h:1261
macroblockd
Variables related to current coding block.
Definition blockd.h:570
macroblockd::mb_to_bottom_edge
int mb_to_bottom_edge
Definition blockd.h:680
macroblockd::plane
struct macroblockd_plane plane[3]
Definition blockd.h:606
macroblockd::mb_to_right_edge
int mb_to_right_edge
Definition blockd.h:678
macroblockd::mi_row
int mi_row
Definition blockd.h:575
macroblockd::mi
MB_MODE_INFO ** mi
Definition blockd.h:617
macroblockd::mi_col
int mi_col
Definition blockd.h:576