4 * Copyright (C) 2012 - 2013 Guillaume Martres
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/pixdesc.h"
25 #include "bit_depth_template.c"
28 #define POS(x, y) src[(x) + stride * (y)]
30 static void FUNC(intra_pred)(HEVCContext *s, int x0, int y0, int log2_size, int c_idx)
33 ((x) >> s->sps->log2_min_pu_size)
35 (s->ref->tab_mvf[(x) + (y) * min_pu_width])
36 #define MVF_PU(x, y) \
37 MVF(PU(x0 + ((x) << hshift)), PU(y0 + ((y) << vshift)))
38 #define IS_INTRA(x, y) \
40 #define MIN_TB_ADDR_ZS(x, y) \
41 s->pps->min_tb_addr_zs[(y) * s->sps->min_tb_width + (x)]
42 #define EXTEND_LEFT(ptr, start, length) \
43 for (i = (start); i > (start) - (length); i--) \
45 #define EXTEND_RIGHT(ptr, start, length) \
46 for (i = (start); i < (start) + (length); i++) \
48 #define EXTEND_UP(ptr, start, length) EXTEND_LEFT(ptr, start, length)
49 #define EXTEND_DOWN(ptr, start, length) EXTEND_RIGHT(ptr, start, length)
50 #define EXTEND_LEFT_CIP(ptr, start, length) \
51 for (i = (start); i > (start) - (length); i--) \
52 if (!IS_INTRA(i - 1, -1)) \
54 #define EXTEND_RIGHT_CIP(ptr, start, length) \
55 for (i = (start); i < (start) + (length); i++) \
56 if (!IS_INTRA(i, -1)) \
58 #define EXTEND_UP_CIP(ptr, start, length) \
59 for (i = (start); i > (start) - (length); i--) \
60 if (!IS_INTRA(-1, i - 1)) \
62 #define EXTEND_UP_CIP_0(ptr, start, length) \
63 for (i = (start); i > (start) - (length); i--) \
65 #define EXTEND_DOWN_CIP(ptr, start, length) \
66 for (i = (start); i < (start) + (length); i++) \
67 if (!IS_INTRA(-1, i)) \
69 HEVCLocalContext *lc = s->HEVClc;
71 int hshift = s->sps->hshift[c_idx];
72 int vshift = s->sps->vshift[c_idx];
73 int size = (1 << log2_size);
74 int size_in_luma = size << hshift;
75 int size_in_tbs = size_in_luma >> s->sps->log2_min_tb_size;
78 int x_tb = x0 >> s->sps->log2_min_tb_size;
79 int y_tb = y0 >> s->sps->log2_min_tb_size;
80 int cur_tb_addr = MIN_TB_ADDR_ZS(x_tb, y_tb);
82 ptrdiff_t stride = s->frame->linesize[c_idx] / sizeof(pixel);
83 pixel *src = (pixel*)s->frame->data[c_idx] + x + y * stride;
85 int min_pu_width = s->sps->min_pu_width;
87 enum IntraPredMode mode = c_idx ? lc->pu.intra_pred_mode_c :
88 lc->tu.cur_intra_pred_mode;
90 pixel left_array[2 * MAX_TB_SIZE + 1];
91 pixel filtered_left_array[2 * MAX_TB_SIZE + 1];
92 pixel top_array[2 * MAX_TB_SIZE + 1];
93 pixel filtered_top_array[2 * MAX_TB_SIZE + 1];
95 pixel *left = left_array + 1;
96 pixel *top = top_array + 1;
97 pixel *filtered_left = filtered_left_array + 1;
98 pixel *filtered_top = filtered_top_array + 1;
100 int cand_bottom_left = lc->na.cand_bottom_left && cur_tb_addr > MIN_TB_ADDR_ZS(x_tb - 1, y_tb + size_in_tbs);
101 int cand_left = lc->na.cand_left;
102 int cand_up_left = lc->na.cand_up_left;
103 int cand_up = lc->na.cand_up;
104 int cand_up_right = lc->na.cand_up_right && cur_tb_addr > MIN_TB_ADDR_ZS(x_tb + size_in_tbs, y_tb - 1);
106 int bottom_left_size = (FFMIN(y0 + 2 * size_in_luma, s->sps->height) -
107 (y0 + size_in_luma)) >> vshift;
108 int top_right_size = (FFMIN(x0 + 2 * size_in_luma, s->sps->width) -
109 (x0 + size_in_luma)) >> hshift;
111 if (s->pps->constrained_intra_pred_flag == 1) {
112 int size_in_luma_pu = PU(size_in_luma);
113 int on_pu_edge_x = !(x0 & ((1 << s->sps->log2_min_pu_size) - 1));
114 int on_pu_edge_y = !(y0 & ((1 << s->sps->log2_min_pu_size) - 1));
115 if (!size_in_luma_pu)
117 if (cand_bottom_left == 1 && on_pu_edge_x) {
118 int x_left_pu = PU(x0 - 1);
119 int y_bottom_pu = PU(y0 + size_in_luma);
120 int max = FFMIN(size_in_luma_pu, s->sps->min_pu_height - y_bottom_pu);
121 cand_bottom_left = 0;
122 for (i = 0; i < max; i++)
123 cand_bottom_left |= MVF(x_left_pu, y_bottom_pu + i).is_intra;
125 if (cand_left == 1 && on_pu_edge_x) {
126 int x_left_pu = PU(x0 - 1);
127 int y_left_pu = PU(y0);
128 int max = FFMIN(size_in_luma_pu, s->sps->min_pu_height - y_left_pu);
130 for (i = 0; i < max; i++)
131 cand_left |= MVF(x_left_pu, y_left_pu + i).is_intra;
133 if (cand_up_left == 1) {
134 int x_left_pu = PU(x0 - 1);
135 int y_top_pu = PU(y0 - 1);
136 cand_up_left = MVF(x_left_pu, y_top_pu).is_intra;
138 if (cand_up == 1 && on_pu_edge_y) {
139 int x_top_pu = PU(x0);
140 int y_top_pu = PU(y0 - 1);
141 int max = FFMIN(size_in_luma_pu, s->sps->min_pu_width - x_top_pu);
143 for (i = 0; i < max; i++)
144 cand_up |= MVF(x_top_pu + i, y_top_pu).is_intra;
146 if (cand_up_right == 1 && on_pu_edge_y) {
147 int y_top_pu = PU(y0 - 1);
148 int x_right_pu = PU(x0 + size_in_luma);
149 int max = FFMIN(size_in_luma_pu, s->sps->min_pu_width - x_right_pu);
151 for (i = 0; i < max; i++)
152 cand_up_right |= MVF(x_right_pu + i, y_top_pu).is_intra;
154 for (i = 0; i < 2 * MAX_TB_SIZE; i++) {
159 if (cand_bottom_left) {
160 for (i = size + bottom_left_size; i < (size << 1); i++)
161 if (IS_INTRA(-1, size + bottom_left_size - 1) ||
162 !s->pps->constrained_intra_pred_flag)
163 left[i] = POS(-1, size + bottom_left_size - 1);
164 for (i = size + bottom_left_size - 1; i >= size; i--)
165 if (IS_INTRA(-1, i) || !s->pps->constrained_intra_pred_flag)
166 left[i] = POS(-1, i);
169 for (i = size - 1; i >= 0; i--)
170 if (IS_INTRA(-1, i) || !s->pps->constrained_intra_pred_flag)
171 left[i] = POS(-1, i);
173 if (IS_INTRA(-1, -1) || !s->pps->constrained_intra_pred_flag) {
174 left[-1] = POS(-1, -1);
178 for (i = size - 1; i >= 0; i--)
179 if (IS_INTRA(i, -1) || !s->pps->constrained_intra_pred_flag)
182 for (i = size + top_right_size; i < (size << 1); i++)
183 if (IS_INTRA(size + top_right_size - 1, -1) ||
184 !s->pps->constrained_intra_pred_flag)
185 top[i] = POS(size + top_right_size - 1, -1);
186 for (i = size + top_right_size - 1; i >= size; i--)
187 if (IS_INTRA(i, -1) || !s->pps->constrained_intra_pred_flag)
191 if (s->pps->constrained_intra_pred_flag == 1) {
192 if (cand_bottom_left || cand_left || cand_up_left || cand_up || cand_up_right) {
193 int size_max_x = x0 + ((2 * size) << hshift) < s->sps->width ?
194 2 * size : (s->sps->width - x0) >> hshift;
195 int size_max_y = y0 + ((2 * size) << vshift) < s->sps->height ?
196 2 * size : (s->sps->height - y0) >> vshift;
197 int j = size + (cand_bottom_left? bottom_left_size: 0) -1;
198 if (!cand_up_right) {
199 size_max_x = x0 + ((size) << hshift) < s->sps->width ?
200 size : (s->sps->width - x0) >> hshift;
202 if (!cand_bottom_left) {
203 size_max_y = y0 + (( size) << vshift) < s->sps->height ?
204 size : (s->sps->height - y0) >> vshift;
206 if (cand_bottom_left || cand_left || cand_up_left) {
207 while (j > -1 && !IS_INTRA(-1, j))
209 if (!IS_INTRA(-1, j)) {
211 while (j < size_max_x && !IS_INTRA(j, -1))
213 EXTEND_LEFT_CIP(top, j, j + 1);
219 while (j < size_max_x && !IS_INTRA(j, -1))
223 EXTEND_LEFT_CIP(top, j, j + 1);
225 EXTEND_LEFT_CIP(top, j, j);
231 if (cand_bottom_left || cand_left) {
232 EXTEND_DOWN_CIP(left, j, size_max_y - j);
235 EXTEND_DOWN(left, 0, size);
237 if (!cand_bottom_left) {
238 EXTEND_DOWN(left, size, size);
240 if (x0 != 0 && y0 != 0) {
241 EXTEND_UP_CIP(left, size_max_y - 1, size_max_y);
242 } else if (x0 == 0) {
243 EXTEND_UP_CIP_0(left, size_max_y - 1, size_max_y);
245 EXTEND_UP_CIP(left, size_max_y - 1, size_max_y - 1);
249 EXTEND_RIGHT_CIP(top, 0, size_max_x);
253 // Infer the unavailable samples
254 if (!cand_bottom_left) {
256 EXTEND_DOWN(left, size, size);
257 } else if (cand_up_left) {
258 EXTEND_DOWN(left, 0, 2 * size);
260 } else if (cand_up) {
262 EXTEND_DOWN(left, 0, 2 * size);
265 } else if (cand_up_right) {
266 EXTEND_LEFT(top, size, size);
268 EXTEND_DOWN(left, 0, 2 * size);
272 } else { // No samples available
273 top[0] = left[-1] = (1 << (BIT_DEPTH - 1));
274 EXTEND_RIGHT(top, 1, 2 * size - 1);
275 EXTEND_DOWN(left, 0, 2 * size);
280 EXTEND_UP(left, size, size);
287 EXTEND_RIGHT(top, 1, size - 1);
289 if (!cand_up_right) {
290 EXTEND_RIGHT(top, size, size);
296 if (c_idx == 0 && mode != INTRA_DC && size != 4) {
297 int intra_hor_ver_dist_thresh[] = { 7, 1, 0 };
298 int min_dist_vert_hor = FFMIN(FFABS((int)(mode - 26U)),
299 FFABS((int)(mode - 10U)));
300 if (min_dist_vert_hor > intra_hor_ver_dist_thresh[log2_size - 3]) {
301 int threshold = 1 << (BIT_DEPTH - 5);
302 if (s->sps->sps_strong_intra_smoothing_enable_flag &&
304 FFABS(top[-1] + top[63] - 2 * top[31]) < threshold &&
305 FFABS(left[-1] + left[63] - 2 * left[31]) < threshold) {
306 // We can't just overwrite values in top because it could be
307 // a pointer into src
308 filtered_top[-1] = top[-1];
309 filtered_top[63] = top[63];
310 for (i = 0; i < 63; i++)
311 filtered_top[i] = ((64 - (i + 1)) * top[-1] +
312 (i + 1) * top[63] + 32) >> 6;
313 for (i = 0; i < 63; i++)
314 left[i] = ((64 - (i + 1)) * left[-1] +
315 (i + 1) * left[63] + 32) >> 6;
318 filtered_left[2 * size - 1] = left[2 * size - 1];
319 filtered_top[2 * size - 1] = top[2 * size - 1];
320 for (i = 2 * size - 2; i >= 0; i--)
321 filtered_left[i] = (left[i + 1] + 2 * left[i] +
322 left[i - 1] + 2) >> 2;
324 filtered_left[-1] = (left[0] + 2 * left[-1] + top[0] + 2) >> 2;
325 for (i = 2 * size - 2; i >= 0; i--)
326 filtered_top[i] = (top[i + 1] + 2 * top[i] +
327 top[i - 1] + 2) >> 2;
328 left = filtered_left;
336 s->hpc.pred_planar[log2_size - 2]((uint8_t *)src, (uint8_t *)top,
337 (uint8_t *)left, stride);
340 s->hpc.pred_dc((uint8_t *)src, (uint8_t *)top,
341 (uint8_t *)left, stride, log2_size, c_idx);
344 s->hpc.pred_angular[log2_size - 2]((uint8_t *)src, (uint8_t *)top,
345 (uint8_t *)left, stride, c_idx,
351 static void FUNC(pred_planar_0)(uint8_t *_src, const uint8_t *_top,
352 const uint8_t *_left,
356 pixel *src = (pixel *)_src;
357 const pixel *top = (const pixel *)_top;
358 const pixel *left = (const pixel *)_left;
359 for (y = 0; y < 4; y++)
360 for (x = 0; x < 4; x++)
361 POS(x, y) = ((3 - x) * left[y] + (x + 1) * top[4] +
362 (3 - y) * top[x] + (y + 1) * left[4] + 4) >> 3;
365 static void FUNC(pred_planar_1)(uint8_t *_src, const uint8_t *_top,
366 const uint8_t *_left, ptrdiff_t stride)
369 pixel *src = (pixel *)_src;
370 const pixel *top = (const pixel *)_top;
371 const pixel *left = (const pixel *)_left;
372 for (y = 0; y < 8; y++)
373 for (x = 0; x < 8; x++)
374 POS(x, y) = ((7 - x) * left[y] + (x + 1) * top[8] +
375 (7 - y) * top[x] + (y + 1) * left[8] + 8) >> 4;
378 static void FUNC(pred_planar_2)(uint8_t *_src, const uint8_t *_top,
379 const uint8_t *_left, ptrdiff_t stride)
382 pixel *src = (pixel *)_src;
383 const pixel *top = (const pixel *)_top;
384 const pixel *left = (const pixel *)_left;
385 for (y = 0; y < 16; y++)
386 for (x = 0; x < 16; x++)
387 POS(x, y) = ((15 - x) * left[y] + (x + 1) * top[16] +
388 (15 - y) * top[x] + (y + 1) * left[16] + 16) >> 5;
391 static void FUNC(pred_planar_3)(uint8_t *_src, const uint8_t *_top,
392 const uint8_t *_left, ptrdiff_t stride)
395 pixel *src = (pixel *)_src;
396 const pixel *top = (const pixel *)_top;
397 const pixel *left = (const pixel *)_left;
398 for (y = 0; y < 32; y++)
399 for (x = 0; x < 32; x++)
400 POS(x, y) = ((31 - x) * left[y] + (x + 1) * top[32] +
401 (31 - y) * top[x] + (y + 1) * left[32] + 32) >> 6;
404 static void FUNC(pred_dc)(uint8_t *_src, const uint8_t *_top,
405 const uint8_t *_left,
406 ptrdiff_t stride, int log2_size, int c_idx)
409 int size = (1 << log2_size);
410 pixel *src = (pixel *)_src;
411 const pixel *top = (const pixel *)_top;
412 const pixel *left = (const pixel *)_left;
415 for (i = 0; i < size; i++)
416 dc += left[i] + top[i];
418 dc >>= log2_size + 1;
420 a = PIXEL_SPLAT_X4(dc);
422 for (i = 0; i < size; i++)
423 for (j = 0; j < size / 4; j++)
424 AV_WN4PA(&POS(j * 4, i), a);
426 if (c_idx == 0 && size < 32) {
427 POS(0, 0) = (left[0] + 2 * dc + top[0] + 2) >> 2;
428 for (x = 1; x < size; x++)
429 POS(x, 0) = (top[x] + 3 * dc + 2) >> 2;
430 for (y = 1; y < size; y++)
431 POS(0, y) = (left[y] + 3 * dc + 2) >> 2;
435 static av_always_inline void FUNC(pred_angular)(uint8_t *_src,
437 const uint8_t *_left,
438 ptrdiff_t stride, int c_idx,
442 pixel *src = (pixel *)_src;
443 const pixel *top = (const pixel *)_top;
444 const pixel *left = (const pixel *)_left;
446 static const int intra_pred_angle[] = {
447 32, 26, 21, 17, 13, 9, 5, 2, 0, -2, -5, -9, -13, -17, -21, -26, -32,
448 -26, -21, -17, -13, -9, -5, -2, 0, 2, 5, 9, 13, 17, 21, 26, 32
450 static const int inv_angle[] = {
451 -4096, -1638, -910, -630, -482, -390, -315, -256, -315, -390, -482,
452 -630, -910, -1638, -4096
455 int angle = intra_pred_angle[mode - 2];
456 pixel ref_array[3 * MAX_TB_SIZE + 1];
457 pixel *ref_tmp = ref_array + size;
459 int last = (size * angle) >> 5;
463 if (angle < 0 && last < -1) {
464 for (x = 0; x <= size; x++)
465 ref_tmp[x] = top[x - 1];
466 for (x = last; x <= -1; x++)
467 ref_tmp[x] = left[-1 + ((x * inv_angle[mode - 11] + 128) >> 8)];
471 for (y = 0; y < size; y++) {
472 int idx = ((y + 1) * angle) >> 5;
473 int fact = ((y + 1) * angle) & 31;
475 for (x = 0; x < size; x++) {
476 POS(x, y) = ((32 - fact) * ref[x + idx + 1] +
477 fact * ref[x + idx + 2] + 16) >> 5;
480 for (x = 0; x < size; x++)
481 POS(x, y) = ref[x + idx + 1];
484 if (mode == 26 && c_idx == 0 && size < 32) {
485 for (y = 0; y < size; y++)
486 POS(0, y) = av_clip_pixel(top[0] + ((left[y] - left[-1]) >> 1));
490 if (angle < 0 && last < -1) {
491 for (x = 0; x <= size; x++)
492 ref_tmp[x] = left[x - 1];
493 for (x = last; x <= -1; x++)
494 ref_tmp[x] = top[-1 + ((x * inv_angle[mode - 11] + 128) >> 8)];
498 for (x = 0; x < size; x++) {
499 int idx = ((x + 1) * angle) >> 5;
500 int fact = ((x + 1) * angle) & 31;
502 for (y = 0; y < size; y++) {
503 POS(x, y) = ((32 - fact) * ref[y + idx + 1] +
504 fact * ref[y + idx + 2] + 16) >> 5;
507 for (y = 0; y < size; y++)
508 POS(x, y) = ref[y + idx + 1];
511 if (mode == 10 && c_idx == 0 && size < 32) {
512 for (x = 0; x < size; x++)
513 POS(x, 0) = av_clip_pixel(left[0] + ((top[x] - top[-1]) >> 1));
518 static void FUNC(pred_angular_0)(uint8_t *src, const uint8_t *top,
520 ptrdiff_t stride, int c_idx, int mode)
522 FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 2);
525 static void FUNC(pred_angular_1)(uint8_t *src, const uint8_t *top,
527 ptrdiff_t stride, int c_idx, int mode)
529 FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 3);
532 static void FUNC(pred_angular_2)(uint8_t *src, const uint8_t *top,
534 ptrdiff_t stride, int c_idx, int mode)
536 FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 4);
539 static void FUNC(pred_angular_3)(uint8_t *src, const uint8_t *top,
541 ptrdiff_t stride, int c_idx, int mode)
543 FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 5);
546 #undef EXTEND_LEFT_CIP
547 #undef EXTEND_RIGHT_CIP
549 #undef EXTEND_DOWN_CIP
558 #undef MIN_TB_ADDR_ZS