Add HEVC decoder

Initially written by Guillaume Martres <smarter@ubuntu.com> as a GSoC
project. Further contributions by the OpenHEVC project and other
developers, namely:

Mickaël Raulet <mraulet@insa-rennes.fr>
Seppo Tomperi <seppo.tomperi@vtt.fi>
Gildas Cocherel <gildas.cocherel@laposte.net>
Khaled Jerbi <khaled_jerbi@yahoo.fr>
Wassim Hamidouche <wassim.hamidouche@insa-rennes.fr>
Vittorio Giovara <vittorio.giovara@gmail.com>
Jan Ekström <jeebjp@gmail.com>
Anton Khirnov <anton@khirnov.net>
Martin Storsjö <martin@martin.st>
Luca Barbato <lu_zero@gentoo.org>
Yusuke Nakamura <muken.the.vfrmaniac@gmail.com>
Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Diego Biurrun <diego@biurrun.de>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

1 files changed, 745 insertions, 0 deletions

diff --git a/libavcodec/hevc_filter.c b/libavcodec/hevc_filter.c
new file mode 100644
index 0000000000..bb1e360dd4
--- /dev/null
+++ b/libavcodec/hevc_filter.c
@@ -0,0 +1,745 @@
+/*
+ * HEVC video decoder
+ *
+ * Copyright (C) 2012 - 2013 Guillaume Martres
+ * Copyright (C) 2013 Seppo Tomperi
+ * Copyright (C) 2013 Wassim Hamidouche
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/common.h"
+#include "libavutil/internal.h"
+
+#include "cabac_functions.h"
+#include "golomb.h"
+#include "hevc.h"
+
+#define LUMA 0
+#define CB 1
+#define CR 2
+
+static const uint8_t tctable[54] = {
+    0, 0, 0, 0, 0, 0, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0, 1, // QP  0...18
+    1, 1, 1, 1, 1, 1, 1,  1,  2,  2,  2,  2,  3,  3,  3,  3, 4, 4, 4, // QP 19...37
+    5, 5, 6, 6, 7, 8, 9, 10, 11, 13, 14, 16, 18, 20, 22, 24           // QP 38...53
+};
+
+static const uint8_t betatable[52] = {
+     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  6,  7,  8, // QP 0...18
+     9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, // QP 19...37
+    38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64                      // QP 38...51
+};
+
+static int chroma_tc(HEVCContext *s, int qp_y, int c_idx, int tc_offset)
+{
+    static const int qp_c[] = {
+        29, 30, 31, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37
+    };
+    int qp, qp_i, offset, idxt;
+
+    // slice qp offset is not used for deblocking
+    if (c_idx == 1)
+        offset = s->pps->cb_qp_offset;
+    else
+        offset = s->pps->cr_qp_offset;
+
+    qp_i = av_clip_c(qp_y + offset, 0, 57);
+    if (qp_i < 30)
+        qp = qp_i;
+    else if (qp_i > 43)
+        qp = qp_i - 6;
+    else
+        qp = qp_c[qp_i - 30];
+
+    idxt = av_clip_c(qp + DEFAULT_INTRA_TC_OFFSET + tc_offset, 0, 53);
+    return tctable[idxt];
+}
+
+static int get_qPy_pred(HEVCContext *s, int xC, int yC,
+                        int xBase, int yBase, int log2_cb_size)
+{
+    HEVCLocalContext *lc     = &s->HEVClc;
+    int ctb_size_mask        = (1 << s->sps->log2_ctb_size) - 1;
+    int MinCuQpDeltaSizeMask = (1 << (s->sps->log2_ctb_size -
+                                      s->pps->diff_cu_qp_delta_depth)) - 1;
+    int xQgBase              = xBase - (xBase & MinCuQpDeltaSizeMask);
+    int yQgBase              = yBase - (yBase & MinCuQpDeltaSizeMask);
+    int min_cb_width         = s->sps->min_cb_width;
+    int min_cb_height        = s->sps->min_cb_height;
+    int x_cb                 = xQgBase >> s->sps->log2_min_cb_size;
+    int y_cb                 = yQgBase >> s->sps->log2_min_cb_size;
+    int availableA           = (xBase   & ctb_size_mask) &&
+                               (xQgBase & ctb_size_mask);
+    int availableB           = (yBase   & ctb_size_mask) &&
+                               (yQgBase & ctb_size_mask);
+    int qPy_pred, qPy_a, qPy_b;
+
+    // qPy_pred
+    if (lc->first_qp_group) {
+        lc->first_qp_group = !lc->tu.is_cu_qp_delta_coded;
+        qPy_pred = s->sh.slice_qp;
+    } else {
+        qPy_pred = lc->qp_y;
+        if (log2_cb_size < s->sps->log2_ctb_size -
+                           s->pps->diff_cu_qp_delta_depth) {
+            static const int offsetX[8][8] = {
+                { -1, 1, 3, 1, 7, 1, 3, 1 },
+                {  0, 0, 0, 0, 0, 0, 0, 0 },
+                {  1, 3, 1, 3, 1, 3, 1, 3 },
+                {  2, 2, 2, 2, 2, 2, 2, 2 },
+                {  3, 5, 7, 5, 3, 5, 7, 5 },
+                {  4, 4, 4, 4, 4, 4, 4, 4 },
+                {  5, 7, 5, 7, 5, 7, 5, 7 },
+                {  6, 6, 6, 6, 6, 6, 6, 6 }
+            };
+            static const int offsetY[8][8] = {
+                { 7, 0, 1, 2, 3, 4, 5, 6 },
+                { 0, 1, 2, 3, 4, 5, 6, 7 },
+                { 1, 0, 3, 2, 5, 4, 7, 6 },
+                { 0, 1, 2, 3, 4, 5, 6, 7 },
+                { 3, 0, 1, 2, 7, 4, 5, 6 },
+                { 0, 1, 2, 3, 4, 5, 6, 7 },
+                { 1, 0, 3, 2, 5, 4, 7, 6 },
+                { 0, 1, 2, 3, 4, 5, 6, 7 }
+            };
+            int xC0b = (xC - (xC & ctb_size_mask)) >> s->sps->log2_min_cb_size;
+            int yC0b = (yC - (yC & ctb_size_mask)) >> s->sps->log2_min_cb_size;
+            int idxX = (xQgBase  & ctb_size_mask)  >> s->sps->log2_min_cb_size;
+            int idxY = (yQgBase  & ctb_size_mask)  >> s->sps->log2_min_cb_size;
+            int idx_mask = ctb_size_mask >> s->sps->log2_min_cb_size;
+            int x, y;
+
+            x = FFMIN(xC0b +  offsetX[idxX][idxY],             min_cb_width  - 1);
+            y = FFMIN(yC0b + (offsetY[idxX][idxY] & idx_mask), min_cb_height - 1);
+
+            if (xC0b == (lc->start_of_tiles_x >> s->sps->log2_min_cb_size) &&
+                offsetX[idxX][idxY] == -1) {
+                x = (lc->end_of_tiles_x >> s->sps->log2_min_cb_size) - 1;
+                y = yC0b - 1;
+            }
+            qPy_pred = s->qp_y_tab[y * min_cb_width + x];
+        }
+    }
+
+    // qPy_a
+    if (availableA == 0)
+        qPy_a = qPy_pred;
+    else
+        qPy_a = s->qp_y_tab[(x_cb - 1) + y_cb * min_cb_width];
+
+    // qPy_b
+    if (availableB == 0)
+        qPy_b = qPy_pred;
+    else
+        qPy_b = s->qp_y_tab[x_cb + (y_cb - 1) * min_cb_width];
+
+    return (qPy_a + qPy_b + 1) >> 1;
+}
+
+void ff_hevc_set_qPy(HEVCContext *s, int xC, int yC,
+                     int xBase, int yBase, int log2_cb_size)
+{
+    int qp_y = get_qPy_pred(s, xC, yC, xBase, yBase, log2_cb_size);
+
+    if (s->HEVClc.tu.cu_qp_delta != 0) {
+        int off = s->sps->qp_bd_offset;
+        s->HEVClc.qp_y = ((qp_y + s->HEVClc.tu.cu_qp_delta + 52 + 2 * off) %
+                          (52 + off)) - off;
+    } else
+        s->HEVClc.qp_y = qp_y;
+}
+
+static int get_qPy(HEVCContext *s, int xC, int yC)
+{
+    int log2_min_cb_size  = s->sps->log2_min_cb_size;
+    int x                 = xC >> log2_min_cb_size;
+    int y                 = yC >> log2_min_cb_size;
+    return s->qp_y_tab[x + y * s->sps->min_cb_width];
+}
+
+static void copy_CTB(uint8_t *dst, uint8_t *src,
+                     int width, int height, int stride)
+{
+    int i;
+
+    for (i = 0; i < height; i++) {
+        memcpy(dst, src, width);
+        dst += stride;
+        src += stride;
+    }
+}
+
+#define CTB(tab, x, y) ((tab)[(y) * s->sps->ctb_width + (x)])
+
+static void sao_filter_CTB(HEVCContext *s, int x, int y)
+{
+    //  TODO: This should be easily parallelizable
+    //  TODO: skip CBs when (cu_transquant_bypass_flag || (pcm_loop_filter_disable_flag && pcm_flag))
+    int c_idx = 0;
+    int class = 1, class_index;
+    int edges[4];  // 0 left 1 top 2 right 3 bottom
+    SAOParams *sao[4];
+    int classes[4];
+    int x_shift = 0, y_shift = 0;
+    int x_ctb = x >> s->sps->log2_ctb_size;
+    int y_ctb = y >> s->sps->log2_ctb_size;
+    int ctb_addr_rs = y_ctb * s->sps->ctb_width + x_ctb;
+    int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[ctb_addr_rs];
+
+    // flags indicating unfilterable edges
+    uint8_t vert_edge[]  = { 0, 0, 0, 0 };
+    uint8_t horiz_edge[] = { 0, 0, 0, 0 };
+    uint8_t diag_edge[]  = { 0, 0, 0, 0 };
+    uint8_t lfase[3]; // current, above, left
+    uint8_t no_tile_filter = s->pps->tiles_enabled_flag &&
+                             !s->pps->loop_filter_across_tiles_enabled_flag;
+    uint8_t left_tile_edge = 0, up_tile_edge = 0;
+
+    sao[0]     = &CTB(s->sao, x_ctb, y_ctb);
+    edges[0]   = x_ctb == 0;
+    edges[1]   = y_ctb == 0;
+    edges[2]   = x_ctb == s->sps->ctb_width  - 1;
+    edges[3]   = y_ctb == s->sps->ctb_height - 1;
+    lfase[0]   = CTB(s->filter_slice_edges, x_ctb, y_ctb);
+    classes[0] = 0;
+
+    if (!edges[0]) {
+        left_tile_edge = no_tile_filter && s->pps->tile_id[ctb_addr_ts] != s->pps->tile_id[s->pps->ctb_addr_rs_to_ts[ctb_addr_rs-1]];
+        sao[class] = &CTB(s->sao, x_ctb - 1, y_ctb);
+        vert_edge[0] = (!lfase[0] && CTB(s->tab_slice_address, x_ctb, y_ctb) != CTB(s->tab_slice_address, x_ctb - 1, y_ctb)) || left_tile_edge;
+        vert_edge[2] = vert_edge[0];
+        lfase[2]     = CTB(s->filter_slice_edges, x_ctb - 1, y_ctb);
+        classes[class] = 2;
+        class++;
+        x_shift = 8;
+    }
+
+    if (!edges[1]) {
+        up_tile_edge = no_tile_filter && s->pps->tile_id[ctb_addr_ts] != s->pps->tile_id[s->pps->ctb_addr_rs_to_ts[ctb_addr_rs - s->sps->ctb_width]];
+        sao[class] = &CTB(s->sao, x_ctb, y_ctb - 1);
+        horiz_edge[0] = (!lfase[0] && CTB(s->tab_slice_address, x_ctb, y_ctb) != CTB(s->tab_slice_address, x_ctb, y_ctb - 1)) || up_tile_edge;
+        horiz_edge[1] = horiz_edge[0];
+        lfase[1] = CTB(s->filter_slice_edges, x_ctb, y_ctb - 1);
+        classes[class] = 1;
+        class++;
+        y_shift = 4;
+
+        if (!edges[0]) {
+            classes[class] = 3;
+            sao[class] = &CTB(s->sao, x_ctb - 1, y_ctb - 1);
+            class++;
+
+            // Tile check here is done current CTB row/col, not above/left like you'd expect,
+            //but that is because the tile boundary always extends through the whole pic
+            vert_edge[1] = (!lfase[1] && CTB(s->tab_slice_address, x_ctb, y_ctb - 1) != CTB(s->tab_slice_address, x_ctb - 1, y_ctb - 1)) || left_tile_edge;
+            vert_edge[3] = vert_edge[1];
+            horiz_edge[2] = (!lfase[2] && CTB(s->tab_slice_address, x_ctb - 1, y_ctb) != CTB(s->tab_slice_address, x_ctb - 1, y_ctb - 1)) || up_tile_edge;
+            horiz_edge[3] = horiz_edge[2];
+            diag_edge[0] = (!lfase[0] && CTB(s->tab_slice_address, x_ctb, y_ctb) != CTB(s->tab_slice_address, x_ctb - 1, y_ctb - 1)) || left_tile_edge || up_tile_edge;
+            diag_edge[3] = diag_edge[0];
+
+            // Does left CTB comes after above CTB?
+            if (CTB(s->tab_slice_address, x_ctb - 1, y_ctb) >
+                CTB(s->tab_slice_address, x_ctb, y_ctb - 1)) {
+                diag_edge[2] = !lfase[2] || left_tile_edge || up_tile_edge;
+                diag_edge[1] = diag_edge[2];
+            } else if (CTB(s->tab_slice_address, x_ctb - 1, y_ctb) <
+                       CTB(s->tab_slice_address, x_ctb, y_ctb - 1)) {
+                diag_edge[1] = !lfase[1] || left_tile_edge || up_tile_edge;
+                diag_edge[2] = diag_edge[1];
+            } else {
+                // Same slice, only consider tiles
+                diag_edge[2] = left_tile_edge || up_tile_edge;
+                diag_edge[1] = diag_edge[2];
+            }
+        }
+    }
+
+    for (c_idx = 0; c_idx < 3; c_idx++) {
+        int chroma = c_idx ? 1 : 0;
+        int x0 = x >> chroma;
+        int y0 = y >> chroma;
+        int stride = s->frame->linesize[c_idx];
+        int ctb_size = (1 << (s->sps->log2_ctb_size)) >> s->sps->hshift[c_idx];
+        int width = FFMIN(ctb_size,
+                          (s->sps->width >> s->sps->hshift[c_idx]) - x0);
+        int height = FFMIN(ctb_size,
+                           (s->sps->height >> s->sps->vshift[c_idx]) - y0);
+
+        uint8_t *src = &s->frame->data[c_idx][y0 * stride + (x0 << s->sps->pixel_shift)];
+        uint8_t *dst = &s->sao_frame->data[c_idx][y0 * stride + (x0 << s->sps->pixel_shift)];
+        int offset = (y_shift >> chroma) * stride + ((x_shift >> chroma) << s->sps->pixel_shift);
+
+        copy_CTB(dst - offset, src - offset,
+                 (edges[2] ? width  + (x_shift >> chroma) : width)  << s->sps->pixel_shift,
+                 (edges[3] ? height + (y_shift >> chroma) : height), stride);
+
+        for (class_index = 0; class_index < class; class_index++) {
+
+            switch (sao[class_index]->type_idx[c_idx]) {
+            case SAO_BAND:
+                s->hevcdsp.sao_band_filter[classes[class_index]](dst, src,
+                                                                 stride,
+                                                                 sao[class_index],
+                                                                 edges, width,
+                                                                 height, c_idx);
+                break;
+            case SAO_EDGE:
+                s->hevcdsp.sao_edge_filter[classes[class_index]](dst, src,
+                                                                 stride,
+                                                                 sao[class_index],
+                                                                 edges, width,
+                                                                 height, c_idx,
+                                                                 vert_edge[classes[class_index]],
+                                                                 horiz_edge[classes[class_index]],
+                                                                 diag_edge[classes[class_index]]);
+                break;
+            }
+        }
+    }
+}
+
+static int get_pcm(HEVCContext *s, int x, int y)
+{
+    int log2_min_pu_size = s->sps->log2_min_pu_size;
+    int x_pu             = x >> log2_min_pu_size;
+    int y_pu             = y >> log2_min_pu_size;
+
+    if (x < 0 || x_pu >= s->sps->min_pu_width ||
+        y < 0 || y_pu >= s->sps->min_pu_height)
+        return 2;
+    return s->is_pcm[y_pu * s->sps->min_pu_width + x_pu];
+}
+
+#define TC_CALC(qp, bs)                                                 \
+    tctable[av_clip((qp) + DEFAULT_INTRA_TC_OFFSET * ((bs) - 1) +       \
+                    (tc_offset >> 1 << 1),                              \
+                    0, MAX_QP + DEFAULT_INTRA_TC_OFFSET)]
+
+static void deblocking_filter_CTB(HEVCContext *s, int x0, int y0)
+{
+    uint8_t *src;
+    int x, y, x_end, y_end, chroma;
+    int c_tc[2], beta[2], tc[2];
+    uint8_t no_p[2] = { 0 };
+    uint8_t no_q[2] = { 0 };
+
+    int log2_ctb_size = s->sps->log2_ctb_size;
+    int ctb_size        = 1 << log2_ctb_size;
+    int ctb             = (x0 >> log2_ctb_size) +
+                          (y0 >> log2_ctb_size) * s->sps->ctb_width;
+    int cur_tc_offset   = s->deblock[ctb].tc_offset;
+    int cur_beta_offset = s->deblock[ctb].beta_offset;
+    int tc_offset, left_tc_offset, beta_offset, left_beta_offset;
+    int pcmf = (s->sps->pcm_enabled_flag &&
+                s->sps->pcm.loop_filter_disable_flag) ||
+               s->pps->transquant_bypass_enable_flag;
+
+    if (x0) {
+        left_tc_offset   = s->deblock[ctb - 1].tc_offset;
+        left_beta_offset = s->deblock[ctb - 1].beta_offset;
+    }
+
+    x_end = x0 + ctb_size;
+    if (x_end > s->sps->width)
+        x_end = s->sps->width;
+    y_end = y0 + ctb_size;
+    if (y_end > s->sps->height)
+        y_end = s->sps->height;
+
+    tc_offset   = cur_tc_offset;
+    beta_offset = cur_beta_offset;
+
+    // vertical filtering luma
+    for (y = y0; y < y_end; y += 8) {
+        for (x = x0 ? x0 : 8; x < x_end; x += 8) {
+            const int bs0 = s->vertical_bs[(x >> 3) + (y       >> 2) * s->bs_width];
+            const int bs1 = s->vertical_bs[(x >> 3) + ((y + 4) >> 2) * s->bs_width];
+            if (bs0 || bs1) {
+                const int qp0 = (get_qPy(s, x - 1, y)     + get_qPy(s, x, y)     + 1) >> 1;
+                const int qp1 = (get_qPy(s, x - 1, y + 4) + get_qPy(s, x, y + 4) + 1) >> 1;
+
+                beta[0] = betatable[av_clip(qp0 + (beta_offset >> 1 << 1), 0, MAX_QP)];
+                beta[1] = betatable[av_clip(qp1 + (beta_offset >> 1 << 1), 0, MAX_QP)];
+                tc[0]   = bs0 ? TC_CALC(qp0, bs0) : 0;
+                tc[1]   = bs1 ? TC_CALC(qp1, bs1) : 0;
+                src     = &s->frame->data[LUMA][y * s->frame->linesize[LUMA] + (x << s->sps->pixel_shift)];
+                if (pcmf) {
+                    no_p[0] = get_pcm(s, x - 1, y);
+                    no_p[1] = get_pcm(s, x - 1, y + 4);
+                    no_q[0] = get_pcm(s, x, y);
+                    no_q[1] = get_pcm(s, x, y + 4);
+                    s->hevcdsp.hevc_v_loop_filter_luma_c(src,
+                                                         s->frame->linesize[LUMA],
+                                                         beta, tc, no_p, no_q);
+                } else
+                    s->hevcdsp.hevc_v_loop_filter_luma(src,
+                                                       s->frame->linesize[LUMA],
+                                                       beta, tc, no_p, no_q);
+            }
+        }
+    }
+
+    // vertical filtering chroma
+    for (chroma = 1; chroma <= 2; chroma++) {
+        for (y = y0; y < y_end; y += 16) {
+            for (x = x0 ? x0 : 16; x < x_end; x += 16) {
+                const int bs0 = s->vertical_bs[(x >> 3) + (y       >> 2) * s->bs_width];
+                const int bs1 = s->vertical_bs[(x >> 3) + ((y + 8) >> 2) * s->bs_width];
+                if ((bs0 == 2) || (bs1 == 2)) {
+                    const int qp0 = (get_qPy(s, x - 1, y)     + get_qPy(s, x, y)     + 1) >> 1;
+                    const int qp1 = (get_qPy(s, x - 1, y + 8) + get_qPy(s, x, y + 8) + 1) >> 1;
+
+                    c_tc[0] = (bs0 == 2) ? chroma_tc(s, qp0, chroma, tc_offset) : 0;
+                    c_tc[1] = (bs1 == 2) ? chroma_tc(s, qp1, chroma, tc_offset) : 0;
+                    src     = &s->frame->data[chroma][y / 2 * s->frame->linesize[chroma] + ((x / 2) << s->sps->pixel_shift)];
+                    if (pcmf) {
+                        no_p[0] = get_pcm(s, x - 1, y);
+                        no_p[1] = get_pcm(s, x - 1, y + 8);
+                        no_q[0] = get_pcm(s, x, y);
+                        no_q[1] = get_pcm(s, x, y + 8);
+                        s->hevcdsp.hevc_v_loop_filter_chroma_c(src,
+                                                               s->frame->linesize[chroma],
+                                                               c_tc, no_p, no_q);
+                    } else
+                        s->hevcdsp.hevc_v_loop_filter_chroma(src,
+                                                             s->frame->linesize[chroma],
+                                                             c_tc, no_p, no_q);
+                }
+            }
+        }
+    }
+
+    // horizontal filtering luma
+    if (x_end != s->sps->width)
+        x_end -= 8;
+    for (y = y0 ? y0 : 8; y < y_end; y += 8) {
+        for (x = x0 ? x0 - 8 : 0; x < x_end; x += 8) {
+            const int bs0 = s->horizontal_bs[(x +     y * s->bs_width) >> 2];
+            const int bs1 = s->horizontal_bs[(x + 4 + y * s->bs_width) >> 2];
+            if (bs0 || bs1) {
+                const int qp0 = (get_qPy(s, x, y - 1)     + get_qPy(s, x, y)     + 1) >> 1;
+                const int qp1 = (get_qPy(s, x + 4, y - 1) + get_qPy(s, x + 4, y) + 1) >> 1;
+
+                tc_offset   = x >= x0 ? cur_tc_offset : left_tc_offset;
+                beta_offset = x >= x0 ? cur_beta_offset : left_beta_offset;
+
+                beta[0] = betatable[av_clip(qp0 + (beta_offset >> 1 << 1), 0, MAX_QP)];
+                beta[1] = betatable[av_clip(qp1 + (beta_offset >> 1 << 1), 0, MAX_QP)];
+                tc[0]   = bs0 ? TC_CALC(qp0, bs0) : 0;
+                tc[1]   = bs1 ? TC_CALC(qp1, bs1) : 0;
+                src     = &s->frame->data[LUMA][y * s->frame->linesize[LUMA] + (x << s->sps->pixel_shift)];
+                if (pcmf) {
+                    no_p[0] = get_pcm(s, x, y - 1);
+                    no_p[1] = get_pcm(s, x + 4, y - 1);
+                    no_q[0] = get_pcm(s, x, y);
+                    no_q[1] = get_pcm(s, x + 4, y);
+                    s->hevcdsp.hevc_h_loop_filter_luma_c(src,
+                                                         s->frame->linesize[LUMA],
+                                                         beta, tc, no_p, no_q);
+                } else
+                    s->hevcdsp.hevc_h_loop_filter_luma(src,
+                                                       s->frame->linesize[LUMA],
+                                                       beta, tc, no_p, no_q);
+            }
+        }
+    }
+
+    // horizontal filtering chroma
+    for (chroma = 1; chroma <= 2; chroma++) {
+        for (y = y0 ? y0 : 16; y < y_end; y += 16) {
+            for (x = x0 - 8; x < x_end; x += 16) {
+                int bs0, bs1;
+                // to make sure no memory access over boundary when x = -8
+                // TODO: simplify with row based deblocking
+                if (x < 0) {
+                    bs0 = 0;
+                    bs1 = s->horizontal_bs[(x + 8 + y * s->bs_width) >> 2];
+                } else if (x >= x_end - 8) {
+                    bs0 = s->horizontal_bs[(x +     y * s->bs_width) >> 2];
+                    bs1 = 0;
+                } else {
+                    bs0 = s->horizontal_bs[(x + y     * s->bs_width) >> 2];
+                    bs1 = s->horizontal_bs[(x + 8 + y * s->bs_width) >> 2];
+                }
+
+                if ((bs0 == 2) || (bs1 == 2)) {
+                    const int qp0 = bs0 == 2 ? (get_qPy(s, x,     y - 1) + get_qPy(s, x,     y) + 1) >> 1 : 0;
+                    const int qp1 = bs1 == 2 ? (get_qPy(s, x + 8, y - 1) + get_qPy(s, x + 8, y) + 1) >> 1 : 0;
+
+                    tc_offset = x >= x0 ? cur_tc_offset : left_tc_offset;
+                    c_tc[0]   = bs0 == 2 ? chroma_tc(s, qp0, chroma, tc_offset)     : 0;
+                    c_tc[1]   = bs1 == 2 ? chroma_tc(s, qp1, chroma, cur_tc_offset) : 0;
+                    src       = &s->frame->data[chroma][y / 2 * s->frame->linesize[chroma] + ((x / 2) << s->sps->pixel_shift)];
+                    if (pcmf) {
+                        no_p[0] = get_pcm(s, x, y - 1);
+                        no_p[1] = get_pcm(s, x + 8, y - 1);
+                        no_q[0] = get_pcm(s, x, y);
+                        no_q[1] = get_pcm(s, x + 8, y);
+                        s->hevcdsp.hevc_h_loop_filter_chroma_c(src,
+                                                               s->frame->linesize[chroma],
+                                                               c_tc, no_p, no_q);
+                    } else
+                        s->hevcdsp.hevc_h_loop_filter_chroma(src,
+                                                             s->frame->linesize[chroma],
+                                                             c_tc, no_p, no_q);
+                }
+            }
+        }
+    }
+}
+
+static int boundary_strength(HEVCContext *s, MvField *curr,
+                             uint8_t curr_cbf_luma, MvField *neigh,
+                             uint8_t neigh_cbf_luma,
+                             RefPicList *neigh_refPicList,
+                             int tu_border)
+{
+    int mvs = curr->pred_flag[0] + curr->pred_flag[1];
+
+    if (tu_border) {
+        if (curr->is_intra || neigh->is_intra)
+            return 2;
+        if (curr_cbf_luma || neigh_cbf_luma)
+            return 1;
+    }
+
+    if (mvs == neigh->pred_flag[0] + neigh->pred_flag[1]) {
+        if (mvs == 2) {
+            // same L0 and L1
+            if (s->ref->refPicList[0].list[curr->ref_idx[0]] == neigh_refPicList[0].list[neigh->ref_idx[0]]  &&
+                s->ref->refPicList[0].list[curr->ref_idx[0]] == s->ref->refPicList[1].list[curr->ref_idx[1]] &&
+                neigh_refPicList[0].list[neigh->ref_idx[0]] == neigh_refPicList[1].list[neigh->ref_idx[1]]) {
+                if ((abs(neigh->mv[0].x - curr->mv[0].x) >= 4 || abs(neigh->mv[0].y - curr->mv[0].y) >= 4 ||
+                     abs(neigh->mv[1].x - curr->mv[1].x) >= 4 || abs(neigh->mv[1].y - curr->mv[1].y) >= 4) &&
+                    (abs(neigh->mv[1].x - curr->mv[0].x) >= 4 || abs(neigh->mv[1].y - curr->mv[0].y) >= 4 ||
+                     abs(neigh->mv[0].x - curr->mv[1].x) >= 4 || abs(neigh->mv[0].y - curr->mv[1].y) >= 4))
+                    return 1;
+                else
+                    return 0;
+            } else if (neigh_refPicList[0].list[neigh->ref_idx[0]] == s->ref->refPicList[0].list[curr->ref_idx[0]] &&
+                       neigh_refPicList[1].list[neigh->ref_idx[1]] == s->ref->refPicList[1].list[curr->ref_idx[1]]) {
+                if (abs(neigh->mv[0].x - curr->mv[0].x) >= 4 || abs(neigh->mv[0].y - curr->mv[0].y) >= 4 ||
+                    abs(neigh->mv[1].x - curr->mv[1].x) >= 4 || abs(neigh->mv[1].y - curr->mv[1].y) >= 4)
+                    return 1;
+                else
+                    return 0;
+            } else if (neigh_refPicList[1].list[neigh->ref_idx[1]] == s->ref->refPicList[0].list[curr->ref_idx[0]] &&
+                       neigh_refPicList[0].list[neigh->ref_idx[0]] == s->ref->refPicList[1].list[curr->ref_idx[1]]) {
+                if (abs(neigh->mv[1].x - curr->mv[0].x) >= 4 || abs(neigh->mv[1].y - curr->mv[0].y) >= 4 ||
+                    abs(neigh->mv[0].x - curr->mv[1].x) >= 4 || abs(neigh->mv[0].y - curr->mv[1].y) >= 4)
+                    return 1;
+                else
+                    return 0;
+            } else {
+                return 1;
+            }
+        } else { // 1 MV
+            Mv A, B;
+            int ref_A, ref_B;
+
+            if (curr->pred_flag[0]) {
+                A     = curr->mv[0];
+                ref_A = s->ref->refPicList[0].list[curr->ref_idx[0]];
+            } else {
+                A     = curr->mv[1];
+                ref_A = s->ref->refPicList[1].list[curr->ref_idx[1]];
+            }
+
+            if (neigh->pred_flag[0]) {
+                B     = neigh->mv[0];
+                ref_B = neigh_refPicList[0].list[neigh->ref_idx[0]];
+            } else {
+                B     = neigh->mv[1];
+                ref_B = neigh_refPicList[1].list[neigh->ref_idx[1]];
+            }
+
+            if (ref_A == ref_B) {
+                if (abs(A.x - B.x) >= 4 || abs(A.y - B.y) >= 4)
+                    return 1;
+                else
+                    return 0;
+            } else
+                return 1;
+        }
+    }
+
+    return 1;
+}
+
+void ff_hevc_deblocking_boundary_strengths(HEVCContext *s, int x0, int y0,
+                                           int log2_trafo_size,
+                                           int slice_or_tiles_up_boundary,
+                                           int slice_or_tiles_left_boundary)
+{
+    MvField *tab_mvf     = s->ref->tab_mvf;
+    int log2_min_pu_size = s->sps->log2_min_pu_size;
+    int log2_min_tu_size = s->sps->log2_min_tb_size;
+    int min_pu_width     = s->sps->min_pu_width;
+    int min_tu_width     = s->sps->min_tb_width;
+    int is_intra = tab_mvf[(y0 >> log2_min_pu_size) * min_pu_width +
+                           (x0 >> log2_min_pu_size)].is_intra;
+    int i, j, bs;
+
+    if (y0 > 0 && (y0 & 7) == 0) {
+        int yp_pu = (y0 - 1) >> log2_min_pu_size;
+        int yq_pu =  y0      >> log2_min_pu_size;
+        int yp_tu = (y0 - 1) >> log2_min_tu_size;
+        int yq_tu =  y0      >> log2_min_tu_size;
+
+        for (i = 0; i < (1 << log2_trafo_size); i += 4) {
+            int x_pu = (x0 + i) >> log2_min_pu_size;
+            int x_tu = (x0 + i) >> log2_min_tu_size;
+            MvField *top  = &tab_mvf[yp_pu * min_pu_width + x_pu];
+            MvField *curr = &tab_mvf[yq_pu * min_pu_width + x_pu];
+            uint8_t top_cbf_luma  = s->cbf_luma[yp_tu * min_tu_width + x_tu];
+            uint8_t curr_cbf_luma = s->cbf_luma[yq_tu * min_tu_width + x_tu];
+            RefPicList *top_refPicList = ff_hevc_get_ref_list(s, s->ref,
+                                                              x0 + i, y0 - 1);
+
+            bs = boundary_strength(s, curr, curr_cbf_luma,
+                                   top, top_cbf_luma, top_refPicList, 1);
+            if (!s->sh.slice_loop_filter_across_slices_enabled_flag &&
+                (slice_or_tiles_up_boundary & 1) &&
+                (y0 % (1 << s->sps->log2_ctb_size)) == 0)
+                bs = 0;
+            else if (!s->pps->loop_filter_across_tiles_enabled_flag &&
+                     (slice_or_tiles_up_boundary & 2) &&
+                     (y0 % (1 << s->sps->log2_ctb_size)) == 0)
+                bs = 0;
+            if (y0 == 0 || s->sh.disable_deblocking_filter_flag == 1)
+                bs = 0;
+            if (bs)
+                s->horizontal_bs[((x0 + i) + y0 * s->bs_width) >> 2] = bs;
+        }
+    }
+
+    // bs for TU internal horizontal PU boundaries
+    if (log2_trafo_size > s->sps->log2_min_pu_size && !is_intra)
+        for (j = 8; j < (1 << log2_trafo_size); j += 8) {
+            int yp_pu = (y0 + j - 1) >> log2_min_pu_size;
+            int yq_pu = (y0 + j)     >> log2_min_pu_size;
+            int yp_tu = (y0 + j - 1) >> log2_min_tu_size;
+            int yq_tu = (y0 + j)     >> log2_min_tu_size;
+
+            for (i = 0; i < (1 << log2_trafo_size); i += 4) {
+                int x_pu = (x0 + i) >> log2_min_pu_size;
+                int x_tu = (x0 + i) >> log2_min_tu_size;
+                MvField *top  = &tab_mvf[yp_pu * min_pu_width + x_pu];
+                MvField *curr = &tab_mvf[yq_pu * min_pu_width + x_pu];
+                uint8_t top_cbf_luma  = s->cbf_luma[yp_tu * min_tu_width + x_tu];
+                uint8_t curr_cbf_luma = s->cbf_luma[yq_tu * min_tu_width + x_tu];
+                RefPicList *top_refPicList = ff_hevc_get_ref_list(s, s->ref,
+                                                                  x0 + i,
+                                                                  y0 + j - 1);
+
+                bs = boundary_strength(s, curr, curr_cbf_luma,
+                                       top, top_cbf_luma, top_refPicList, 0);
+                if (s->sh.disable_deblocking_filter_flag == 1)
+                    bs = 0;
+                if (bs)
+                    s->horizontal_bs[((x0 + i) + (y0 + j) * s->bs_width) >> 2] = bs;
+            }
+        }
+
+    // bs for vertical TU boundaries
+    if (x0 > 0 && (x0 & 7) == 0) {
+        int xp_pu = (x0 - 1) >> log2_min_pu_size;
+        int xq_pu =  x0      >> log2_min_pu_size;
+        int xp_tu = (x0 - 1) >> log2_min_tu_size;
+        int xq_tu =  x0      >> log2_min_tu_size;
+
+        for (i = 0; i < (1 << log2_trafo_size); i += 4) {
+            int y_pu      = (y0 + i) >> log2_min_pu_size;
+            int y_tu      = (y0 + i) >> log2_min_tu_size;
+            MvField *left = &tab_mvf[y_pu * min_pu_width + xp_pu];
+            MvField *curr = &tab_mvf[y_pu * min_pu_width + xq_pu];
+
+            uint8_t left_cbf_luma = s->cbf_luma[y_tu * min_tu_width + xp_tu];
+            uint8_t curr_cbf_luma = s->cbf_luma[y_tu * min_tu_width + xq_tu];
+            RefPicList *left_refPicList = ff_hevc_get_ref_list(s, s->ref,
+                                                               x0 - 1, y0 + i);
+
+            bs = boundary_strength(s, curr, curr_cbf_luma,
+                                   left, left_cbf_luma, left_refPicList, 1);
+            if (!s->sh.slice_loop_filter_across_slices_enabled_flag &&
+                (slice_or_tiles_left_boundary & 1) &&
+                (x0 % (1 << s->sps->log2_ctb_size)) == 0)
+                bs = 0;
+            else if (!s->pps->loop_filter_across_tiles_enabled_flag &&
+                     (slice_or_tiles_left_boundary & 2) &&
+                     (x0 % (1 << s->sps->log2_ctb_size)) == 0)
+                bs = 0;
+            if (x0 == 0 || s->sh.disable_deblocking_filter_flag == 1)
+                bs = 0;
+            if (bs)
+                s->vertical_bs[(x0 >> 3) + ((y0 + i) >> 2) * s->bs_width] = bs;
+        }
+    }
+
+    // bs for TU internal vertical PU boundaries
+    if (log2_trafo_size > log2_min_pu_size && !is_intra)
+        for (j = 0; j < (1 << log2_trafo_size); j += 4) {
+            int y_pu = (y0 + j) >> log2_min_pu_size;
+            int y_tu = (y0 + j) >> log2_min_tu_size;
+
+            for (i = 8; i < (1 << log2_trafo_size); i += 8) {
+                int xp_pu = (x0 + i - 1) >> log2_min_pu_size;
+                int xq_pu = (x0 + i)     >> log2_min_pu_size;
+                int xp_tu = (x0 + i - 1) >> log2_min_tu_size;
+                int xq_tu = (x0 + i)     >> log2_min_tu_size;
+                MvField *left = &tab_mvf[y_pu * min_pu_width + xp_pu];
+                MvField *curr = &tab_mvf[y_pu * min_pu_width + xq_pu];
+                uint8_t left_cbf_luma = s->cbf_luma[y_tu * min_tu_width + xp_tu];
+                uint8_t curr_cbf_luma = s->cbf_luma[y_tu * min_tu_width + xq_tu];
+                RefPicList *left_refPicList = ff_hevc_get_ref_list(s, s->ref,
+                                                                   x0 + i - 1,
+                                                                   y0 + j);
+
+                bs = boundary_strength(s, curr, curr_cbf_luma,
+                                       left, left_cbf_luma, left_refPicList, 0);
+                if (s->sh.disable_deblocking_filter_flag == 1)
+                    bs = 0;
+                if (bs)
+                    s->vertical_bs[((x0 + i) >> 3) + ((y0 + j) >> 2) * s->bs_width] = bs;
+            }
+        }
+}
+
+#undef LUMA
+#undef CB
+#undef CR
+
+void ff_hevc_hls_filter(HEVCContext *s, int x, int y)
+{
+    deblocking_filter_CTB(s, x, y);
+    if (s->sps->sao_enabled)
+        sao_filter_CTB(s, x, y);
+}
+
+void ff_hevc_hls_filters(HEVCContext *s, int x_ctb, int y_ctb, int ctb_size)
+{
+    if (y_ctb && x_ctb)
+        ff_hevc_hls_filter(s, x_ctb - ctb_size, y_ctb - ctb_size);
+    if (y_ctb && x_ctb >= s->sps->width - ctb_size) {
+        ff_hevc_hls_filter(s, x_ctb, y_ctb - ctb_size);
+        ff_thread_report_progress(&s->ref->tf, y_ctb - ctb_size, 0);
+    }
+    if (x_ctb && y_ctb >= s->sps->height - ctb_size)
+        ff_hevc_hls_filter(s, x_ctb - ctb_size, y_ctb);
+}