553 lines
22 KiB
C
553 lines
22 KiB
C
/*
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* HEVC video decoder
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*
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* Copyright (C) 2012 - 2013 Guillaume Martres
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/pixdesc.h"
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#include "bit_depth_template.c"
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#include "hevcpred.h"
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#define POS(x, y) src[(x) + stride * (y)]
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static av_always_inline void FUNC(intra_pred)(HEVCContext *s, int x0, int y0,
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int log2_size, int c_idx)
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{
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#define PU(x) \
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((x) >> s->ps.sps->log2_min_pu_size)
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#define MVF(x, y) \
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(s->ref->tab_mvf[(x) + (y) * min_pu_width])
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#define MVF_PU(x, y) \
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MVF(PU(x0 + ((x) * (1 << hshift))), PU(y0 + ((y) * (1 << vshift))))
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#define IS_INTRA(x, y) \
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(MVF_PU(x, y).pred_flag == PF_INTRA)
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#define MIN_TB_ADDR_ZS(x, y) \
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s->ps.pps->min_tb_addr_zs[(y) * (s->ps.sps->tb_mask+2) + (x)]
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#define EXTEND(ptr, val, len) \
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do { \
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pixel4 pix = PIXEL_SPLAT_X4(val); \
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for (i = 0; i < (len); i += 4) \
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AV_WN4P(ptr + i, pix); \
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} while (0)
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#define EXTEND_RIGHT_CIP(ptr, start, length) \
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for (i = start; i < (start) + (length); i += 4) \
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if (!IS_INTRA(i, -1)) \
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AV_WN4P(&ptr[i], a); \
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else \
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a = PIXEL_SPLAT_X4(ptr[i+3])
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#define EXTEND_LEFT_CIP(ptr, start, length) \
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for (i = start; i > (start) - (length); i--) \
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if (!IS_INTRA(i - 1, -1)) \
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ptr[i - 1] = ptr[i]
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#define EXTEND_UP_CIP(ptr, start, length) \
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for (i = (start); i > (start) - (length); i -= 4) \
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if (!IS_INTRA(-1, i - 3)) \
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AV_WN4P(&ptr[i - 3], a); \
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else \
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a = PIXEL_SPLAT_X4(ptr[i - 3])
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#define EXTEND_DOWN_CIP(ptr, start, length) \
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for (i = start; i < (start) + (length); i += 4) \
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if (!IS_INTRA(-1, i)) \
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AV_WN4P(&ptr[i], a); \
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else \
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a = PIXEL_SPLAT_X4(ptr[i + 3])
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HEVCLocalContext *lc = s->HEVClc;
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int i;
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int hshift = s->ps.sps->hshift[c_idx];
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int vshift = s->ps.sps->vshift[c_idx];
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int size = (1 << log2_size);
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int size_in_luma_h = size << hshift;
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int size_in_tbs_h = size_in_luma_h >> s->ps.sps->log2_min_tb_size;
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int size_in_luma_v = size << vshift;
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int size_in_tbs_v = size_in_luma_v >> s->ps.sps->log2_min_tb_size;
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int x = x0 >> hshift;
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int y = y0 >> vshift;
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int x_tb = (x0 >> s->ps.sps->log2_min_tb_size) & s->ps.sps->tb_mask;
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int y_tb = (y0 >> s->ps.sps->log2_min_tb_size) & s->ps.sps->tb_mask;
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int spin = c_idx && !size_in_tbs_v && ((2 * y0) & (1 << s->ps.sps->log2_min_tb_size));
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int cur_tb_addr = MIN_TB_ADDR_ZS(x_tb, y_tb);
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ptrdiff_t stride = s->frame->linesize[c_idx] / sizeof(pixel);
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pixel *src = (pixel*)s->frame->data[c_idx] + x + y * stride;
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int min_pu_width = s->ps.sps->min_pu_width;
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enum IntraPredMode mode = c_idx ? lc->tu.intra_pred_mode_c :
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lc->tu.intra_pred_mode;
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pixel4 a;
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pixel left_array[2 * MAX_TB_SIZE + 1];
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pixel filtered_left_array[2 * MAX_TB_SIZE + 1];
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pixel top_array[2 * MAX_TB_SIZE + 1];
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pixel filtered_top_array[2 * MAX_TB_SIZE + 1];
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pixel *left = left_array + 1;
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pixel *top = top_array + 1;
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pixel *filtered_left = filtered_left_array + 1;
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pixel *filtered_top = filtered_top_array + 1;
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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) & s->ps.sps->tb_mask);
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int cand_left = lc->na.cand_left;
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int cand_up_left = lc->na.cand_up_left;
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int cand_up = lc->na.cand_up;
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int cand_up_right = lc->na.cand_up_right && !spin && cur_tb_addr > MIN_TB_ADDR_ZS((x_tb + size_in_tbs_h) & s->ps.sps->tb_mask, y_tb - 1);
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int bottom_left_size = (FFMIN(y0 + 2 * size_in_luma_v, s->ps.sps->height) -
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(y0 + size_in_luma_v)) >> vshift;
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int top_right_size = (FFMIN(x0 + 2 * size_in_luma_h, s->ps.sps->width) -
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(x0 + size_in_luma_h)) >> hshift;
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if (s->ps.pps->constrained_intra_pred_flag == 1) {
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int size_in_luma_pu_v = PU(size_in_luma_v);
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int size_in_luma_pu_h = PU(size_in_luma_h);
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int on_pu_edge_x = !av_mod_uintp2(x0, s->ps.sps->log2_min_pu_size);
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int on_pu_edge_y = !av_mod_uintp2(y0, s->ps.sps->log2_min_pu_size);
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if (!size_in_luma_pu_h)
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size_in_luma_pu_h++;
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if (cand_bottom_left == 1 && on_pu_edge_x) {
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int x_left_pu = PU(x0 - 1);
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int y_bottom_pu = PU(y0 + size_in_luma_v);
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int max = FFMIN(size_in_luma_pu_v, s->ps.sps->min_pu_height - y_bottom_pu);
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cand_bottom_left = 0;
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for (i = 0; i < max; i += 2)
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cand_bottom_left |= (MVF(x_left_pu, y_bottom_pu + i).pred_flag == PF_INTRA);
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}
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if (cand_left == 1 && on_pu_edge_x) {
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int x_left_pu = PU(x0 - 1);
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int y_left_pu = PU(y0);
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int max = FFMIN(size_in_luma_pu_v, s->ps.sps->min_pu_height - y_left_pu);
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cand_left = 0;
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for (i = 0; i < max; i += 2)
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cand_left |= (MVF(x_left_pu, y_left_pu + i).pred_flag == PF_INTRA);
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}
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if (cand_up_left == 1) {
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int x_left_pu = PU(x0 - 1);
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int y_top_pu = PU(y0 - 1);
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cand_up_left = MVF(x_left_pu, y_top_pu).pred_flag == PF_INTRA;
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}
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if (cand_up == 1 && on_pu_edge_y) {
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int x_top_pu = PU(x0);
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int y_top_pu = PU(y0 - 1);
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int max = FFMIN(size_in_luma_pu_h, s->ps.sps->min_pu_width - x_top_pu);
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cand_up = 0;
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for (i = 0; i < max; i += 2)
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cand_up |= (MVF(x_top_pu + i, y_top_pu).pred_flag == PF_INTRA);
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}
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if (cand_up_right == 1 && on_pu_edge_y) {
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int y_top_pu = PU(y0 - 1);
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int x_right_pu = PU(x0 + size_in_luma_h);
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int max = FFMIN(size_in_luma_pu_h, s->ps.sps->min_pu_width - x_right_pu);
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cand_up_right = 0;
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for (i = 0; i < max; i += 2)
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cand_up_right |= (MVF(x_right_pu + i, y_top_pu).pred_flag == PF_INTRA);
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}
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memset(left, 128, 2 * MAX_TB_SIZE*sizeof(pixel));
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memset(top , 128, 2 * MAX_TB_SIZE*sizeof(pixel));
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top[-1] = 128;
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}
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if (cand_up_left) {
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left[-1] = POS(-1, -1);
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top[-1] = left[-1];
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}
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if (cand_up)
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memcpy(top, src - stride, size * sizeof(pixel));
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if (cand_up_right) {
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memcpy(top + size, src - stride + size, size * sizeof(pixel));
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EXTEND(top + size + top_right_size, POS(size + top_right_size - 1, -1),
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size - top_right_size);
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}
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if (cand_left)
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for (i = 0; i < size; i++)
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left[i] = POS(-1, i);
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if (cand_bottom_left) {
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for (i = size; i < size + bottom_left_size; i++)
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left[i] = POS(-1, i);
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EXTEND(left + size + bottom_left_size, POS(-1, size + bottom_left_size - 1),
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size - bottom_left_size);
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}
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if (s->ps.pps->constrained_intra_pred_flag == 1) {
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if (cand_bottom_left || cand_left || cand_up_left || cand_up || cand_up_right) {
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int size_max_x = x0 + ((2 * size) << hshift) < s->ps.sps->width ?
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2 * size : (s->ps.sps->width - x0) >> hshift;
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int size_max_y = y0 + ((2 * size) << vshift) < s->ps.sps->height ?
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2 * size : (s->ps.sps->height - y0) >> vshift;
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int j = size + (cand_bottom_left? bottom_left_size: 0) -1;
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if (!cand_up_right) {
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size_max_x = x0 + ((size) << hshift) < s->ps.sps->width ?
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size : (s->ps.sps->width - x0) >> hshift;
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}
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if (!cand_bottom_left) {
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size_max_y = y0 + (( size) << vshift) < s->ps.sps->height ?
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size : (s->ps.sps->height - y0) >> vshift;
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}
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if (cand_bottom_left || cand_left || cand_up_left) {
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while (j > -1 && !IS_INTRA(-1, j))
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j--;
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if (!IS_INTRA(-1, j)) {
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j = 0;
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while (j < size_max_x && !IS_INTRA(j, -1))
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j++;
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EXTEND_LEFT_CIP(top, j, j + 1);
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left[-1] = top[-1];
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}
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} else {
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j = 0;
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while (j < size_max_x && !IS_INTRA(j, -1))
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j++;
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if (j > 0)
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if (x0 > 0) {
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EXTEND_LEFT_CIP(top, j, j + 1);
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} else {
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EXTEND_LEFT_CIP(top, j, j);
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top[-1] = top[0];
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}
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left[-1] = top[-1];
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}
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left[-1] = top[-1];
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if (cand_bottom_left || cand_left) {
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a = PIXEL_SPLAT_X4(left[-1]);
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EXTEND_DOWN_CIP(left, 0, size_max_y);
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}
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if (!cand_left)
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EXTEND(left, left[-1], size);
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if (!cand_bottom_left)
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EXTEND(left + size, left[size - 1], size);
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if (x0 != 0 && y0 != 0) {
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a = PIXEL_SPLAT_X4(left[size_max_y - 1]);
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EXTEND_UP_CIP(left, size_max_y - 1, size_max_y);
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if (!IS_INTRA(-1, - 1))
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left[-1] = left[0];
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} else if (x0 == 0) {
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EXTEND(left, 0, size_max_y);
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} else {
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a = PIXEL_SPLAT_X4(left[size_max_y - 1]);
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EXTEND_UP_CIP(left, size_max_y - 1, size_max_y);
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}
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top[-1] = left[-1];
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if (y0 != 0) {
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a = PIXEL_SPLAT_X4(left[-1]);
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EXTEND_RIGHT_CIP(top, 0, size_max_x);
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}
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}
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}
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// Infer the unavailable samples
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if (!cand_bottom_left) {
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if (cand_left) {
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EXTEND(left + size, left[size - 1], size);
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} else if (cand_up_left) {
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EXTEND(left, left[-1], 2 * size);
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cand_left = 1;
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} else if (cand_up) {
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left[-1] = top[0];
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EXTEND(left, left[-1], 2 * size);
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cand_up_left = 1;
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cand_left = 1;
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} else if (cand_up_right) {
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EXTEND(top, top[size], size);
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left[-1] = top[size];
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EXTEND(left, left[-1], 2 * size);
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cand_up = 1;
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cand_up_left = 1;
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cand_left = 1;
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} else { // No samples available
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left[-1] = (1 << (BIT_DEPTH - 1));
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EXTEND(top, left[-1], 2 * size);
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EXTEND(left, left[-1], 2 * size);
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}
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}
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if (!cand_left)
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EXTEND(left, left[size], size);
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if (!cand_up_left) {
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left[-1] = left[0];
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}
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if (!cand_up)
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EXTEND(top, left[-1], size);
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if (!cand_up_right)
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EXTEND(top + size, top[size - 1], size);
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top[-1] = left[-1];
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// Filtering process
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if (!s->ps.sps->intra_smoothing_disabled_flag && (c_idx == 0 || s->ps.sps->chroma_format_idc == 3)) {
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if (mode != INTRA_DC && size != 4){
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int intra_hor_ver_dist_thresh[] = { 7, 1, 0 };
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int min_dist_vert_hor = FFMIN(FFABS((int)(mode - 26U)),
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FFABS((int)(mode - 10U)));
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if (min_dist_vert_hor > intra_hor_ver_dist_thresh[log2_size - 3]) {
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int threshold = 1 << (BIT_DEPTH - 5);
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if (s->ps.sps->sps_strong_intra_smoothing_enable_flag && c_idx == 0 &&
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log2_size == 5 &&
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FFABS(top[-1] + top[63] - 2 * top[31]) < threshold &&
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FFABS(left[-1] + left[63] - 2 * left[31]) < threshold) {
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// We can't just overwrite values in top because it could be
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// a pointer into src
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filtered_top[-1] = top[-1];
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filtered_top[63] = top[63];
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for (i = 0; i < 63; i++)
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filtered_top[i] = ((64 - (i + 1)) * top[-1] +
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(i + 1) * top[63] + 32) >> 6;
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for (i = 0; i < 63; i++)
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left[i] = ((64 - (i + 1)) * left[-1] +
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(i + 1) * left[63] + 32) >> 6;
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top = filtered_top;
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} else {
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filtered_left[2 * size - 1] = left[2 * size - 1];
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filtered_top[2 * size - 1] = top[2 * size - 1];
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for (i = 2 * size - 2; i >= 0; i--)
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filtered_left[i] = (left[i + 1] + 2 * left[i] +
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left[i - 1] + 2) >> 2;
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filtered_top[-1] =
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filtered_left[-1] = (left[0] + 2 * left[-1] + top[0] + 2) >> 2;
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for (i = 2 * size - 2; i >= 0; i--)
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filtered_top[i] = (top[i + 1] + 2 * top[i] +
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top[i - 1] + 2) >> 2;
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left = filtered_left;
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top = filtered_top;
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}
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}
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}
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}
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switch (mode) {
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case INTRA_PLANAR:
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s->hpc.pred_planar[log2_size - 2]((uint8_t *)src, (uint8_t *)top,
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(uint8_t *)left, stride);
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break;
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case INTRA_DC:
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s->hpc.pred_dc((uint8_t *)src, (uint8_t *)top,
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(uint8_t *)left, stride, log2_size, c_idx);
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break;
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default:
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s->hpc.pred_angular[log2_size - 2]((uint8_t *)src, (uint8_t *)top,
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(uint8_t *)left, stride, c_idx,
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mode);
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break;
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}
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}
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#define INTRA_PRED(size) \
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static void FUNC(intra_pred_ ## size)(HEVCContext *s, int x0, int y0, int c_idx) \
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{ \
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FUNC(intra_pred)(s, x0, y0, size, c_idx); \
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}
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INTRA_PRED(2)
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INTRA_PRED(3)
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INTRA_PRED(4)
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INTRA_PRED(5)
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#undef INTRA_PRED
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static av_always_inline void FUNC(pred_planar)(uint8_t *_src, const uint8_t *_top,
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const uint8_t *_left, ptrdiff_t stride,
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int trafo_size)
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{
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int x, y;
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pixel *src = (pixel *)_src;
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const pixel *top = (const pixel *)_top;
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const pixel *left = (const pixel *)_left;
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int size = 1 << trafo_size;
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for (y = 0; y < size; y++)
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for (x = 0; x < size; x++)
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POS(x, y) = ((size - 1 - x) * left[y] + (x + 1) * top[size] +
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(size - 1 - y) * top[x] + (y + 1) * left[size] + size) >> (trafo_size + 1);
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}
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#define PRED_PLANAR(size)\
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static void FUNC(pred_planar_ ## size)(uint8_t *src, const uint8_t *top, \
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const uint8_t *left, ptrdiff_t stride) \
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{ \
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FUNC(pred_planar)(src, top, left, stride, size + 2); \
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}
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PRED_PLANAR(0)
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PRED_PLANAR(1)
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PRED_PLANAR(2)
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PRED_PLANAR(3)
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#undef PRED_PLANAR
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static void FUNC(pred_dc)(uint8_t *_src, const uint8_t *_top,
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const uint8_t *_left,
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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
|