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- /*
- * HEVC video decoder
- *
- * Copyright (C) 2012 - 2013 Guillaume Martres
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #include "libavutil/pixdesc.h"
- #include "bit_depth_template.c"
- #include "pred.h"
- #define POS(x, y) src[(x) + stride * (y)]
- static av_always_inline void FUNC(intra_pred)(HEVCLocalContext *lc,
- const HEVCPPS *pps,
- int x0, int y0,
- int log2_size, int c_idx)
- {
- #define PU(x) \
- ((x) >> sps->log2_min_pu_size)
- #define MVF(x, y) \
- (s->cur_frame->tab_mvf[(x) + (y) * min_pu_width])
- #define MVF_PU(x, y) \
- MVF(PU(x0 + ((x) * (1 << hshift))), PU(y0 + ((y) * (1 << vshift))))
- #define IS_INTRA(x, y) \
- (MVF_PU(x, y).pred_flag == PF_INTRA)
- #define MIN_TB_ADDR_ZS(x, y) \
- pps->min_tb_addr_zs[(y) * (sps->tb_mask+2) + (x)]
- #define EXTEND(ptr, val, len) \
- do { \
- pixel4 pix = PIXEL_SPLAT_X4(val); \
- for (i = 0; i < (len); i += 4) \
- AV_WN4P(ptr + i, pix); \
- } while (0)
- #define EXTEND_RIGHT_CIP(ptr, start, length) \
- for (i = start; i < (start) + (length); i += 4) \
- if (!IS_INTRA(i, -1)) \
- AV_WN4P(&ptr[i], a); \
- else \
- a = PIXEL_SPLAT_X4(ptr[i+3])
- #define EXTEND_LEFT_CIP(ptr, start, length) \
- for (i = start; i > (start) - (length); i--) \
- if (!IS_INTRA(i - 1, -1)) \
- ptr[i - 1] = ptr[i]
- #define EXTEND_UP_CIP(ptr, start, length) \
- for (i = (start); i > (start) - (length); i -= 4) \
- if (!IS_INTRA(-1, i - 3)) \
- AV_WN4P(&ptr[i - 3], a); \
- else \
- a = PIXEL_SPLAT_X4(ptr[i - 3])
- #define EXTEND_DOWN_CIP(ptr, start, length) \
- for (i = start; i < (start) + (length); i += 4) \
- if (!IS_INTRA(-1, i)) \
- AV_WN4P(&ptr[i], a); \
- else \
- a = PIXEL_SPLAT_X4(ptr[i + 3])
- const HEVCSPS *const sps = pps->sps;
- const HEVCContext *const s = lc->parent;
- int i;
- int hshift = sps->hshift[c_idx];
- int vshift = sps->vshift[c_idx];
- int size = (1 << log2_size);
- int size_in_luma_h = size << hshift;
- int size_in_tbs_h = size_in_luma_h >> sps->log2_min_tb_size;
- int size_in_luma_v = size << vshift;
- int size_in_tbs_v = size_in_luma_v >> sps->log2_min_tb_size;
- int x = x0 >> hshift;
- int y = y0 >> vshift;
- int x_tb = (x0 >> sps->log2_min_tb_size) & sps->tb_mask;
- int y_tb = (y0 >> sps->log2_min_tb_size) & sps->tb_mask;
- int spin = c_idx && !size_in_tbs_v && ((2 * y0) & (1 << sps->log2_min_tb_size));
- int cur_tb_addr = MIN_TB_ADDR_ZS(x_tb, y_tb);
- ptrdiff_t stride = s->cur_frame->f->linesize[c_idx] / sizeof(pixel);
- pixel *src = (pixel*)s->cur_frame->f->data[c_idx] + x + y * stride;
- int min_pu_width = sps->min_pu_width;
- enum IntraPredMode mode = c_idx ? lc->tu.intra_pred_mode_c :
- lc->tu.intra_pred_mode;
- pixel4 a;
- pixel left_array[2 * MAX_TB_SIZE + 1];
- pixel filtered_left_array[2 * MAX_TB_SIZE + 1];
- pixel top_array[2 * MAX_TB_SIZE + 1];
- pixel filtered_top_array[2 * MAX_TB_SIZE + 1];
- pixel *left = left_array + 1;
- pixel *top = top_array + 1;
- pixel *filtered_left = filtered_left_array + 1;
- pixel *filtered_top = filtered_top_array + 1;
- int cand_bottom_left = lc->na.cand_bottom_left && cur_tb_addr > MIN_TB_ADDR_ZS( x_tb - 1, (y_tb + size_in_tbs_v + spin) & sps->tb_mask);
- int cand_left = lc->na.cand_left;
- int cand_up_left = lc->na.cand_up_left;
- int cand_up = lc->na.cand_up;
- int cand_up_right = lc->na.cand_up_right && !spin && cur_tb_addr > MIN_TB_ADDR_ZS((x_tb + size_in_tbs_h) & sps->tb_mask, y_tb - 1);
- int bottom_left_size = (FFMIN(y0 + 2 * size_in_luma_v, sps->height) -
- (y0 + size_in_luma_v)) >> vshift;
- int top_right_size = (FFMIN(x0 + 2 * size_in_luma_h, sps->width) -
- (x0 + size_in_luma_h)) >> hshift;
- if (pps->constrained_intra_pred_flag == 1) {
- int size_in_luma_pu_v = PU(size_in_luma_v);
- int size_in_luma_pu_h = PU(size_in_luma_h);
- int on_pu_edge_x = !av_zero_extend(x0, sps->log2_min_pu_size);
- int on_pu_edge_y = !av_zero_extend(y0, sps->log2_min_pu_size);
- if (!size_in_luma_pu_h)
- size_in_luma_pu_h++;
- if (cand_bottom_left == 1 && on_pu_edge_x) {
- int x_left_pu = PU(x0 - 1);
- int y_bottom_pu = PU(y0 + size_in_luma_v);
- int max = FFMIN(size_in_luma_pu_v, sps->min_pu_height - y_bottom_pu);
- cand_bottom_left = 0;
- for (i = 0; i < max; i += 2)
- cand_bottom_left |= (MVF(x_left_pu, y_bottom_pu + i).pred_flag == PF_INTRA);
- }
- if (cand_left == 1 && on_pu_edge_x) {
- int x_left_pu = PU(x0 - 1);
- int y_left_pu = PU(y0);
- int max = FFMIN(size_in_luma_pu_v, sps->min_pu_height - y_left_pu);
- cand_left = 0;
- for (i = 0; i < max; i += 2)
- cand_left |= (MVF(x_left_pu, y_left_pu + i).pred_flag == PF_INTRA);
- }
- if (cand_up_left == 1) {
- int x_left_pu = PU(x0 - 1);
- int y_top_pu = PU(y0 - 1);
- cand_up_left = MVF(x_left_pu, y_top_pu).pred_flag == PF_INTRA;
- }
- if (cand_up == 1 && on_pu_edge_y) {
- int x_top_pu = PU(x0);
- int y_top_pu = PU(y0 - 1);
- int max = FFMIN(size_in_luma_pu_h, sps->min_pu_width - x_top_pu);
- cand_up = 0;
- for (i = 0; i < max; i += 2)
- cand_up |= (MVF(x_top_pu + i, y_top_pu).pred_flag == PF_INTRA);
- }
- if (cand_up_right == 1 && on_pu_edge_y) {
- int y_top_pu = PU(y0 - 1);
- int x_right_pu = PU(x0 + size_in_luma_h);
- int max = FFMIN(size_in_luma_pu_h, sps->min_pu_width - x_right_pu);
- cand_up_right = 0;
- for (i = 0; i < max; i += 2)
- cand_up_right |= (MVF(x_right_pu + i, y_top_pu).pred_flag == PF_INTRA);
- }
- memset(left, 128, 2 * MAX_TB_SIZE*sizeof(pixel));
- memset(top , 128, 2 * MAX_TB_SIZE*sizeof(pixel));
- top[-1] = 128;
- }
- if (cand_up_left) {
- left[-1] = POS(-1, -1);
- top[-1] = left[-1];
- }
- if (cand_up)
- memcpy(top, src - stride, size * sizeof(pixel));
- if (cand_up_right) {
- memcpy(top + size, src - stride + size, size * sizeof(pixel));
- EXTEND(top + size + top_right_size, POS(size + top_right_size - 1, -1),
- size - top_right_size);
- }
- if (cand_left)
- for (i = 0; i < size; i++)
- left[i] = POS(-1, i);
- if (cand_bottom_left) {
- for (i = size; i < size + bottom_left_size; i++)
- left[i] = POS(-1, i);
- EXTEND(left + size + bottom_left_size, POS(-1, size + bottom_left_size - 1),
- size - bottom_left_size);
- }
- if (pps->constrained_intra_pred_flag == 1) {
- if (cand_bottom_left || cand_left || cand_up_left || cand_up || cand_up_right) {
- int size_max_x = x0 + ((2 * size) << hshift) < sps->width ?
- 2 * size : (sps->width - x0) >> hshift;
- int size_max_y = y0 + ((2 * size) << vshift) < sps->height ?
- 2 * size : (sps->height - y0) >> vshift;
- int j = size + (cand_bottom_left? bottom_left_size: 0) -1;
- if (!cand_up_right) {
- size_max_x = x0 + ((size) << hshift) < sps->width ?
- size : (sps->width - x0) >> hshift;
- }
- if (!cand_bottom_left) {
- size_max_y = y0 + (( size) << vshift) < sps->height ?
- size : (sps->height - y0) >> vshift;
- }
- if (cand_bottom_left || cand_left || cand_up_left) {
- while (j > -1 && !IS_INTRA(-1, j))
- j--;
- if (!IS_INTRA(-1, j)) {
- j = 0;
- while (j < size_max_x && !IS_INTRA(j, -1))
- j++;
- EXTEND_LEFT_CIP(top, j, j + 1);
- left[-1] = top[-1];
- }
- } else {
- j = 0;
- while (j < size_max_x && !IS_INTRA(j, -1))
- j++;
- if (j > 0) {
- EXTEND_LEFT_CIP(top, j, j);
- top[-1] = top[0];
- }
- left[-1] = top[-1];
- }
- left[-1] = top[-1];
- if (cand_bottom_left || cand_left) {
- a = PIXEL_SPLAT_X4(left[-1]);
- EXTEND_DOWN_CIP(left, 0, size_max_y);
- }
- if (!cand_left)
- EXTEND(left, left[-1], size);
- if (!cand_bottom_left)
- EXTEND(left + size, left[size - 1], size);
- if (x0 != 0 && y0 != 0) {
- a = PIXEL_SPLAT_X4(left[size_max_y - 1]);
- EXTEND_UP_CIP(left, size_max_y - 1, size_max_y);
- if (!IS_INTRA(-1, - 1))
- left[-1] = left[0];
- } else if (x0 == 0) {
- EXTEND(left, 0, size_max_y);
- } else {
- a = PIXEL_SPLAT_X4(left[size_max_y - 1]);
- EXTEND_UP_CIP(left, size_max_y - 1, size_max_y);
- }
- top[-1] = left[-1];
- if (y0 != 0) {
- a = PIXEL_SPLAT_X4(left[-1]);
- EXTEND_RIGHT_CIP(top, 0, size_max_x);
- }
- }
- }
- // Infer the unavailable samples
- if (!cand_bottom_left) {
- if (cand_left) {
- EXTEND(left + size, left[size - 1], size);
- } else if (cand_up_left) {
- EXTEND(left, left[-1], 2 * size);
- cand_left = 1;
- } else if (cand_up) {
- left[-1] = top[0];
- EXTEND(left, left[-1], 2 * size);
- cand_up_left = 1;
- cand_left = 1;
- } else if (cand_up_right) {
- EXTEND(top, top[size], size);
- left[-1] = top[size];
- EXTEND(left, left[-1], 2 * size);
- cand_up = 1;
- cand_up_left = 1;
- cand_left = 1;
- } else { // No samples available
- left[-1] = (1 << (BIT_DEPTH - 1));
- EXTEND(top, left[-1], 2 * size);
- EXTEND(left, left[-1], 2 * size);
- }
- }
- if (!cand_left)
- EXTEND(left, left[size], size);
- if (!cand_up_left) {
- left[-1] = left[0];
- }
- if (!cand_up)
- EXTEND(top, left[-1], size);
- if (!cand_up_right)
- EXTEND(top + size, top[size - 1], size);
- top[-1] = left[-1];
- // Filtering process
- if (!sps->intra_smoothing_disabled && (c_idx == 0 || sps->chroma_format_idc == 3)) {
- if (mode != INTRA_DC && size != 4){
- int intra_hor_ver_dist_thresh[] = { 7, 1, 0 };
- int min_dist_vert_hor = FFMIN(FFABS((int)(mode - 26U)),
- FFABS((int)(mode - 10U)));
- if (min_dist_vert_hor > intra_hor_ver_dist_thresh[log2_size - 3]) {
- int threshold = 1 << (BIT_DEPTH - 5);
- if (sps->strong_intra_smoothing_enabled && c_idx == 0 &&
- log2_size == 5 &&
- FFABS(top[-1] + top[63] - 2 * top[31]) < threshold &&
- FFABS(left[-1] + left[63] - 2 * left[31]) < threshold) {
- // We can't just overwrite values in top because it could be
- // a pointer into src
- filtered_top[-1] = top[-1];
- filtered_top[63] = top[63];
- for (i = 0; i < 63; i++)
- filtered_top[i] = ((64 - (i + 1)) * top[-1] +
- (i + 1) * top[63] + 32) >> 6;
- for (i = 0; i < 63; i++)
- left[i] = ((64 - (i + 1)) * left[-1] +
- (i + 1) * left[63] + 32) >> 6;
- top = filtered_top;
- } else {
- filtered_left[2 * size - 1] = left[2 * size - 1];
- filtered_top[2 * size - 1] = top[2 * size - 1];
- for (i = 2 * size - 2; i >= 0; i--)
- filtered_left[i] = (left[i + 1] + 2 * left[i] +
- left[i - 1] + 2) >> 2;
- filtered_top[-1] =
- filtered_left[-1] = (left[0] + 2 * left[-1] + top[0] + 2) >> 2;
- for (i = 2 * size - 2; i >= 0; i--)
- filtered_top[i] = (top[i + 1] + 2 * top[i] +
- top[i - 1] + 2) >> 2;
- left = filtered_left;
- top = filtered_top;
- }
- }
- }
- }
- switch (mode) {
- case INTRA_PLANAR:
- s->hpc.pred_planar[log2_size - 2]((uint8_t *)src, (uint8_t *)top,
- (uint8_t *)left, stride);
- break;
- case INTRA_DC:
- s->hpc.pred_dc((uint8_t *)src, (uint8_t *)top,
- (uint8_t *)left, stride, log2_size, c_idx);
- break;
- default:
- s->hpc.pred_angular[log2_size - 2]((uint8_t *)src, (uint8_t *)top,
- (uint8_t *)left, stride, c_idx,
- mode);
- break;
- }
- }
- #define INTRA_PRED(size) \
- static void FUNC(intra_pred_ ## size)(HEVCLocalContext *lc, const HEVCPPS *pps, \
- int x0, int y0, int c_idx) \
- { \
- FUNC(intra_pred)(lc, pps, x0, y0, size, c_idx); \
- }
- INTRA_PRED(2)
- INTRA_PRED(3)
- INTRA_PRED(4)
- INTRA_PRED(5)
- #undef INTRA_PRED
- static av_always_inline void FUNC(pred_planar)(uint8_t *_src, const uint8_t *_top,
- const uint8_t *_left, ptrdiff_t stride,
- int trafo_size)
- {
- int x, y;
- pixel *src = (pixel *)_src;
- const pixel *top = (const pixel *)_top;
- const pixel *left = (const pixel *)_left;
- int size = 1 << trafo_size;
- for (y = 0; y < size; y++)
- for (x = 0; x < size; x++)
- POS(x, y) = ((size - 1 - x) * left[y] + (x + 1) * top[size] +
- (size - 1 - y) * top[x] + (y + 1) * left[size] + size) >> (trafo_size + 1);
- }
- #define PRED_PLANAR(size)\
- static void FUNC(pred_planar_ ## size)(uint8_t *src, const uint8_t *top, \
- const uint8_t *left, ptrdiff_t stride) \
- { \
- FUNC(pred_planar)(src, top, left, stride, size + 2); \
- }
- PRED_PLANAR(0)
- PRED_PLANAR(1)
- PRED_PLANAR(2)
- PRED_PLANAR(3)
- #undef PRED_PLANAR
- static void FUNC(pred_dc)(uint8_t *_src, const uint8_t *_top,
- const uint8_t *_left,
- ptrdiff_t stride, int log2_size, int c_idx)
- {
- int i, j, x, y;
- int size = (1 << log2_size);
- pixel *src = (pixel *)_src;
- const pixel *top = (const pixel *)_top;
- const pixel *left = (const pixel *)_left;
- int dc = size;
- pixel4 a;
- for (i = 0; i < size; i++)
- dc += left[i] + top[i];
- dc >>= log2_size + 1;
- a = PIXEL_SPLAT_X4(dc);
- for (i = 0; i < size; i++)
- for (j = 0; j < size; j+=4)
- AV_WN4P(&POS(j, i), a);
- if (c_idx == 0 && size < 32) {
- POS(0, 0) = (left[0] + 2 * dc + top[0] + 2) >> 2;
- for (x = 1; x < size; x++)
- POS(x, 0) = (top[x] + 3 * dc + 2) >> 2;
- for (y = 1; y < size; y++)
- POS(0, y) = (left[y] + 3 * dc + 2) >> 2;
- }
- }
- static av_always_inline void FUNC(pred_angular)(uint8_t *_src,
- const uint8_t *_top,
- const uint8_t *_left,
- ptrdiff_t stride, int c_idx,
- int mode, int size)
- {
- int x, y;
- pixel *src = (pixel *)_src;
- const pixel *top = (const pixel *)_top;
- const pixel *left = (const pixel *)_left;
- static const int intra_pred_angle[] = {
- 32, 26, 21, 17, 13, 9, 5, 2, 0, -2, -5, -9, -13, -17, -21, -26, -32,
- -26, -21, -17, -13, -9, -5, -2, 0, 2, 5, 9, 13, 17, 21, 26, 32
- };
- static const int inv_angle[] = {
- -4096, -1638, -910, -630, -482, -390, -315, -256, -315, -390, -482,
- -630, -910, -1638, -4096
- };
- int angle = intra_pred_angle[mode - 2];
- pixel ref_array[3 * MAX_TB_SIZE + 4];
- pixel *ref_tmp = ref_array + size;
- const pixel *ref;
- int last = (size * angle) >> 5;
- if (mode >= 18) {
- ref = top - 1;
- if (angle < 0 && last < -1) {
- for (x = 0; x <= size; x += 4)
- AV_WN4P(&ref_tmp[x], AV_RN4P(&top[x - 1]));
- for (x = last; x <= -1; x++)
- ref_tmp[x] = left[-1 + ((x * inv_angle[mode - 11] + 128) >> 8)];
- ref = ref_tmp;
- }
- for (y = 0; y < size; y++) {
- int idx = ((y + 1) * angle) >> 5;
- int fact = ((y + 1) * angle) & 31;
- if (fact) {
- for (x = 0; x < size; x += 4) {
- POS(x , y) = ((32 - fact) * ref[x + idx + 1] +
- fact * ref[x + idx + 2] + 16) >> 5;
- POS(x + 1, y) = ((32 - fact) * ref[x + 1 + idx + 1] +
- fact * ref[x + 1 + idx + 2] + 16) >> 5;
- POS(x + 2, y) = ((32 - fact) * ref[x + 2 + idx + 1] +
- fact * ref[x + 2 + idx + 2] + 16) >> 5;
- POS(x + 3, y) = ((32 - fact) * ref[x + 3 + idx + 1] +
- fact * ref[x + 3 + idx + 2] + 16) >> 5;
- }
- } else {
- for (x = 0; x < size; x += 4)
- AV_WN4P(&POS(x, y), AV_RN4P(&ref[x + idx + 1]));
- }
- }
- if (mode == 26 && c_idx == 0 && size < 32) {
- for (y = 0; y < size; y++)
- POS(0, y) = av_clip_pixel(top[0] + ((left[y] - left[-1]) >> 1));
- }
- } else {
- ref = left - 1;
- if (angle < 0 && last < -1) {
- for (x = 0; x <= size; x += 4)
- AV_WN4P(&ref_tmp[x], AV_RN4P(&left[x - 1]));
- for (x = last; x <= -1; x++)
- ref_tmp[x] = top[-1 + ((x * inv_angle[mode - 11] + 128) >> 8)];
- ref = ref_tmp;
- }
- for (x = 0; x < size; x++) {
- int idx = ((x + 1) * angle) >> 5;
- int fact = ((x + 1) * angle) & 31;
- if (fact) {
- for (y = 0; y < size; y++) {
- POS(x, y) = ((32 - fact) * ref[y + idx + 1] +
- fact * ref[y + idx + 2] + 16) >> 5;
- }
- } else {
- for (y = 0; y < size; y++)
- POS(x, y) = ref[y + idx + 1];
- }
- }
- if (mode == 10 && c_idx == 0 && size < 32) {
- for (x = 0; x < size; x += 4) {
- POS(x, 0) = av_clip_pixel(left[0] + ((top[x ] - top[-1]) >> 1));
- POS(x + 1, 0) = av_clip_pixel(left[0] + ((top[x + 1] - top[-1]) >> 1));
- POS(x + 2, 0) = av_clip_pixel(left[0] + ((top[x + 2] - top[-1]) >> 1));
- POS(x + 3, 0) = av_clip_pixel(left[0] + ((top[x + 3] - top[-1]) >> 1));
- }
- }
- }
- }
- static void FUNC(pred_angular_0)(uint8_t *src, const uint8_t *top,
- const uint8_t *left,
- ptrdiff_t stride, int c_idx, int mode)
- {
- FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 2);
- }
- static void FUNC(pred_angular_1)(uint8_t *src, const uint8_t *top,
- const uint8_t *left,
- ptrdiff_t stride, int c_idx, int mode)
- {
- FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 3);
- }
- static void FUNC(pred_angular_2)(uint8_t *src, const uint8_t *top,
- const uint8_t *left,
- ptrdiff_t stride, int c_idx, int mode)
- {
- FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 4);
- }
- static void FUNC(pred_angular_3)(uint8_t *src, const uint8_t *top,
- const uint8_t *left,
- ptrdiff_t stride, int c_idx, int mode)
- {
- FUNC(pred_angular)(src, top, left, stride, c_idx, mode, 1 << 5);
- }
- #undef EXTEND_LEFT_CIP
- #undef EXTEND_RIGHT_CIP
- #undef EXTEND_UP_CIP
- #undef EXTEND_DOWN_CIP
- #undef IS_INTRA
- #undef MVF_PU
- #undef MVF
- #undef PU
- #undef EXTEND
- #undef MIN_TB_ADDR_ZS
- #undef POS
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