diff options
Diffstat (limited to 'third_party/aom/av1/decoder/decodemv.c')
| -rw-r--r-- | third_party/aom/av1/decoder/decodemv.c | 1560 |
1 files changed, 1560 insertions, 0 deletions
diff --git a/third_party/aom/av1/decoder/decodemv.c b/third_party/aom/av1/decoder/decodemv.c new file mode 100644 index 000000000..551e4d543 --- /dev/null +++ b/third_party/aom/av1/decoder/decodemv.c @@ -0,0 +1,1560 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <assert.h> + +#include "av1/common/cfl.h" +#include "av1/common/common.h" +#include "av1/common/entropy.h" +#include "av1/common/entropymode.h" +#include "av1/common/entropymv.h" +#include "av1/common/mvref_common.h" +#include "av1/common/pred_common.h" +#include "av1/common/reconinter.h" +#include "av1/common/reconintra.h" +#include "av1/common/seg_common.h" +#include "av1/common/warped_motion.h" + +#include "av1/decoder/decodeframe.h" +#include "av1/decoder/decodemv.h" + +#include "aom_dsp/aom_dsp_common.h" + +#define ACCT_STR __func__ + +#define DEC_MISMATCH_DEBUG 0 + +static PREDICTION_MODE read_intra_mode(aom_reader *r, aom_cdf_prob *cdf) { + return (PREDICTION_MODE)aom_read_symbol(r, cdf, INTRA_MODES, ACCT_STR); +} + +static void read_cdef(AV1_COMMON *cm, aom_reader *r, MACROBLOCKD *const xd, + int mi_col, int mi_row) { + MB_MODE_INFO *const mbmi = xd->mi[0]; + if (cm->coded_lossless) return; + if (cm->allow_intrabc) { + assert(cm->cdef_bits == 0); + return; + } + + if (!(mi_col & (cm->seq_params.mib_size - 1)) && + !(mi_row & (cm->seq_params.mib_size - 1))) { // Top left? + xd->cdef_preset[0] = xd->cdef_preset[1] = xd->cdef_preset[2] = + xd->cdef_preset[3] = -1; + } + // Read CDEF param at the first non-skip coding block + const int mask = (1 << (6 - MI_SIZE_LOG2)); + const int m = ~(mask - 1); + const int index = cm->seq_params.sb_size == BLOCK_128X128 + ? !!(mi_col & mask) + 2 * !!(mi_row & mask) + : 0; + cm->mi_grid_visible[(mi_row & m) * cm->mi_stride + (mi_col & m)] + ->cdef_strength = xd->cdef_preset[index] = + xd->cdef_preset[index] == -1 && !mbmi->skip + ? aom_read_literal(r, cm->cdef_bits, ACCT_STR) + : xd->cdef_preset[index]; +} + +static int read_delta_qindex(AV1_COMMON *cm, const MACROBLOCKD *xd, + aom_reader *r, MB_MODE_INFO *const mbmi, + int mi_col, int mi_row) { + int sign, abs, reduced_delta_qindex = 0; + BLOCK_SIZE bsize = mbmi->sb_type; + const int b_col = mi_col & (cm->seq_params.mib_size - 1); + const int b_row = mi_row & (cm->seq_params.mib_size - 1); + const int read_delta_q_flag = (b_col == 0 && b_row == 0); + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + + if ((bsize != cm->seq_params.sb_size || mbmi->skip == 0) && + read_delta_q_flag) { + abs = aom_read_symbol(r, ec_ctx->delta_q_cdf, DELTA_Q_PROBS + 1, ACCT_STR); + const int smallval = (abs < DELTA_Q_SMALL); + + if (!smallval) { + const int rem_bits = aom_read_literal(r, 3, ACCT_STR) + 1; + const int thr = (1 << rem_bits) + 1; + abs = aom_read_literal(r, rem_bits, ACCT_STR) + thr; + } + + if (abs) { + sign = aom_read_bit(r, ACCT_STR); + } else { + sign = 1; + } + + reduced_delta_qindex = sign ? -abs : abs; + } + return reduced_delta_qindex; +} +static int read_delta_lflevel(const AV1_COMMON *const cm, aom_reader *r, + aom_cdf_prob *const cdf, + const MB_MODE_INFO *const mbmi, int mi_col, + int mi_row) { + int reduced_delta_lflevel = 0; + const BLOCK_SIZE bsize = mbmi->sb_type; + const int b_col = mi_col & (cm->seq_params.mib_size - 1); + const int b_row = mi_row & (cm->seq_params.mib_size - 1); + const int read_delta_lf_flag = (b_col == 0 && b_row == 0); + + if ((bsize != cm->seq_params.sb_size || mbmi->skip == 0) && + read_delta_lf_flag) { + int abs = aom_read_symbol(r, cdf, DELTA_LF_PROBS + 1, ACCT_STR); + const int smallval = (abs < DELTA_LF_SMALL); + if (!smallval) { + const int rem_bits = aom_read_literal(r, 3, ACCT_STR) + 1; + const int thr = (1 << rem_bits) + 1; + abs = aom_read_literal(r, rem_bits, ACCT_STR) + thr; + } + const int sign = abs ? aom_read_bit(r, ACCT_STR) : 1; + reduced_delta_lflevel = sign ? -abs : abs; + } + return reduced_delta_lflevel; +} + +static UV_PREDICTION_MODE read_intra_mode_uv(FRAME_CONTEXT *ec_ctx, + aom_reader *r, + CFL_ALLOWED_TYPE cfl_allowed, + PREDICTION_MODE y_mode) { + const UV_PREDICTION_MODE uv_mode = + aom_read_symbol(r, ec_ctx->uv_mode_cdf[cfl_allowed][y_mode], + UV_INTRA_MODES - !cfl_allowed, ACCT_STR); + return uv_mode; +} + +static int read_cfl_alphas(FRAME_CONTEXT *const ec_ctx, aom_reader *r, + int *signs_out) { + const int joint_sign = + aom_read_symbol(r, ec_ctx->cfl_sign_cdf, CFL_JOINT_SIGNS, "cfl:signs"); + int idx = 0; + // Magnitudes are only coded for nonzero values + if (CFL_SIGN_U(joint_sign) != CFL_SIGN_ZERO) { + aom_cdf_prob *cdf_u = ec_ctx->cfl_alpha_cdf[CFL_CONTEXT_U(joint_sign)]; + idx = aom_read_symbol(r, cdf_u, CFL_ALPHABET_SIZE, "cfl:alpha_u") + << CFL_ALPHABET_SIZE_LOG2; + } + if (CFL_SIGN_V(joint_sign) != CFL_SIGN_ZERO) { + aom_cdf_prob *cdf_v = ec_ctx->cfl_alpha_cdf[CFL_CONTEXT_V(joint_sign)]; + idx += aom_read_symbol(r, cdf_v, CFL_ALPHABET_SIZE, "cfl:alpha_v"); + } + *signs_out = joint_sign; + return idx; +} + +static INTERINTRA_MODE read_interintra_mode(MACROBLOCKD *xd, aom_reader *r, + int size_group) { + const INTERINTRA_MODE ii_mode = (INTERINTRA_MODE)aom_read_symbol( + r, xd->tile_ctx->interintra_mode_cdf[size_group], INTERINTRA_MODES, + ACCT_STR); + return ii_mode; +} + +static PREDICTION_MODE read_inter_mode(FRAME_CONTEXT *ec_ctx, aom_reader *r, + int16_t ctx) { + int16_t mode_ctx = ctx & NEWMV_CTX_MASK; + int is_newmv, is_zeromv, is_refmv; + is_newmv = aom_read_symbol(r, ec_ctx->newmv_cdf[mode_ctx], 2, ACCT_STR) == 0; + if (is_newmv) return NEWMV; + + mode_ctx = (ctx >> GLOBALMV_OFFSET) & GLOBALMV_CTX_MASK; + is_zeromv = + aom_read_symbol(r, ec_ctx->zeromv_cdf[mode_ctx], 2, ACCT_STR) == 0; + if (is_zeromv) return GLOBALMV; + + mode_ctx = (ctx >> REFMV_OFFSET) & REFMV_CTX_MASK; + is_refmv = aom_read_symbol(r, ec_ctx->refmv_cdf[mode_ctx], 2, ACCT_STR) == 0; + if (is_refmv) + return NEARESTMV; + else + return NEARMV; +} + +static void read_drl_idx(FRAME_CONTEXT *ec_ctx, MACROBLOCKD *xd, + MB_MODE_INFO *mbmi, aom_reader *r) { + uint8_t ref_frame_type = av1_ref_frame_type(mbmi->ref_frame); + mbmi->ref_mv_idx = 0; + if (mbmi->mode == NEWMV || mbmi->mode == NEW_NEWMV) { + for (int idx = 0; idx < 2; ++idx) { + if (xd->ref_mv_count[ref_frame_type] > idx + 1) { + uint8_t drl_ctx = av1_drl_ctx(xd->ref_mv_stack[ref_frame_type], idx); + int drl_idx = aom_read_symbol(r, ec_ctx->drl_cdf[drl_ctx], 2, ACCT_STR); + mbmi->ref_mv_idx = idx + drl_idx; + if (!drl_idx) return; + } + } + } + if (have_nearmv_in_inter_mode(mbmi->mode)) { + // Offset the NEARESTMV mode. + // TODO(jingning): Unify the two syntax decoding loops after the NEARESTMV + // mode is factored in. + for (int idx = 1; idx < 3; ++idx) { + if (xd->ref_mv_count[ref_frame_type] > idx + 1) { + uint8_t drl_ctx = av1_drl_ctx(xd->ref_mv_stack[ref_frame_type], idx); + int drl_idx = aom_read_symbol(r, ec_ctx->drl_cdf[drl_ctx], 2, ACCT_STR); + mbmi->ref_mv_idx = idx + drl_idx - 1; + if (!drl_idx) return; + } + } + } +} + +static MOTION_MODE read_motion_mode(AV1_COMMON *cm, MACROBLOCKD *xd, + MB_MODE_INFO *mbmi, aom_reader *r) { + if (cm->switchable_motion_mode == 0) return SIMPLE_TRANSLATION; + if (mbmi->skip_mode) return SIMPLE_TRANSLATION; + + const MOTION_MODE last_motion_mode_allowed = + motion_mode_allowed(xd->global_motion, xd, mbmi, cm->allow_warped_motion); + int motion_mode; + + if (last_motion_mode_allowed == SIMPLE_TRANSLATION) return SIMPLE_TRANSLATION; + + if (last_motion_mode_allowed == OBMC_CAUSAL) { + motion_mode = + aom_read_symbol(r, xd->tile_ctx->obmc_cdf[mbmi->sb_type], 2, ACCT_STR); + return (MOTION_MODE)(SIMPLE_TRANSLATION + motion_mode); + } else { + motion_mode = + aom_read_symbol(r, xd->tile_ctx->motion_mode_cdf[mbmi->sb_type], + MOTION_MODES, ACCT_STR); + return (MOTION_MODE)(SIMPLE_TRANSLATION + motion_mode); + } +} + +static PREDICTION_MODE read_inter_compound_mode(MACROBLOCKD *xd, aom_reader *r, + int16_t ctx) { + const int mode = + aom_read_symbol(r, xd->tile_ctx->inter_compound_mode_cdf[ctx], + INTER_COMPOUND_MODES, ACCT_STR); + assert(is_inter_compound_mode(NEAREST_NEARESTMV + mode)); + return NEAREST_NEARESTMV + mode; +} + +int av1_neg_deinterleave(int diff, int ref, int max) { + if (!ref) return diff; + if (ref >= (max - 1)) return max - diff - 1; + if (2 * ref < max) { + if (diff <= 2 * ref) { + if (diff & 1) + return ref + ((diff + 1) >> 1); + else + return ref - (diff >> 1); + } + return diff; + } else { + if (diff <= 2 * (max - ref - 1)) { + if (diff & 1) + return ref + ((diff + 1) >> 1); + else + return ref - (diff >> 1); + } + return max - (diff + 1); + } +} + +static int read_segment_id(AV1_COMMON *const cm, const MACROBLOCKD *const xd, + int mi_row, int mi_col, aom_reader *r, int skip) { + int cdf_num; + const int pred = av1_get_spatial_seg_pred(cm, xd, mi_row, mi_col, &cdf_num); + if (skip) return pred; + + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + struct segmentation *const seg = &cm->seg; + struct segmentation_probs *const segp = &ec_ctx->seg; + aom_cdf_prob *pred_cdf = segp->spatial_pred_seg_cdf[cdf_num]; + const int coded_id = aom_read_symbol(r, pred_cdf, MAX_SEGMENTS, ACCT_STR); + const int segment_id = + av1_neg_deinterleave(coded_id, pred, seg->last_active_segid + 1); + + if (segment_id < 0 || segment_id > seg->last_active_segid) { + aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME, + "Corrupted segment_ids"); + } + return segment_id; +} + +static int dec_get_segment_id(const AV1_COMMON *cm, const uint8_t *segment_ids, + int mi_offset, int x_mis, int y_mis) { + int segment_id = INT_MAX; + + for (int y = 0; y < y_mis; y++) + for (int x = 0; x < x_mis; x++) + segment_id = + AOMMIN(segment_id, segment_ids[mi_offset + y * cm->mi_cols + x]); + + assert(segment_id >= 0 && segment_id < MAX_SEGMENTS); + return segment_id; +} + +static void set_segment_id(AV1_COMMON *cm, int mi_offset, int x_mis, int y_mis, + int segment_id) { + assert(segment_id >= 0 && segment_id < MAX_SEGMENTS); + + for (int y = 0; y < y_mis; y++) + for (int x = 0; x < x_mis; x++) + cm->current_frame_seg_map[mi_offset + y * cm->mi_cols + x] = segment_id; +} + +static int read_intra_segment_id(AV1_COMMON *const cm, + const MACROBLOCKD *const xd, int mi_row, + int mi_col, int bsize, aom_reader *r, + int skip) { + struct segmentation *const seg = &cm->seg; + if (!seg->enabled) return 0; // Default for disabled segmentation + + assert(seg->update_map && !seg->temporal_update); + + const int mi_offset = mi_row * cm->mi_cols + mi_col; + const int bw = mi_size_wide[bsize]; + const int bh = mi_size_high[bsize]; + const int x_mis = AOMMIN(cm->mi_cols - mi_col, bw); + const int y_mis = AOMMIN(cm->mi_rows - mi_row, bh); + const int segment_id = read_segment_id(cm, xd, mi_row, mi_col, r, skip); + set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id); + return segment_id; +} + +static void copy_segment_id(const AV1_COMMON *cm, + const uint8_t *last_segment_ids, + uint8_t *current_segment_ids, int mi_offset, + int x_mis, int y_mis) { + for (int y = 0; y < y_mis; y++) + for (int x = 0; x < x_mis; x++) + current_segment_ids[mi_offset + y * cm->mi_cols + x] = + last_segment_ids ? last_segment_ids[mi_offset + y * cm->mi_cols + x] + : 0; +} + +static int get_predicted_segment_id(AV1_COMMON *const cm, int mi_offset, + int x_mis, int y_mis) { + return cm->last_frame_seg_map ? dec_get_segment_id(cm, cm->last_frame_seg_map, + mi_offset, x_mis, y_mis) + : 0; +} + +static int read_inter_segment_id(AV1_COMMON *const cm, MACROBLOCKD *const xd, + int mi_row, int mi_col, int preskip, + aom_reader *r) { + struct segmentation *const seg = &cm->seg; + MB_MODE_INFO *const mbmi = xd->mi[0]; + const int mi_offset = mi_row * cm->mi_cols + mi_col; + const int bw = mi_size_wide[mbmi->sb_type]; + const int bh = mi_size_high[mbmi->sb_type]; + + // TODO(slavarnway): move x_mis, y_mis into xd ????? + const int x_mis = AOMMIN(cm->mi_cols - mi_col, bw); + const int y_mis = AOMMIN(cm->mi_rows - mi_row, bh); + + if (!seg->enabled) return 0; // Default for disabled segmentation + + if (!seg->update_map) { + copy_segment_id(cm, cm->last_frame_seg_map, cm->current_frame_seg_map, + mi_offset, x_mis, y_mis); + return get_predicted_segment_id(cm, mi_offset, x_mis, y_mis); + } + + int segment_id; + if (preskip) { + if (!seg->segid_preskip) return 0; + } else { + if (seg->segid_preskip) return mbmi->segment_id; + if (mbmi->skip) { + if (seg->temporal_update) { + mbmi->seg_id_predicted = 0; + } + segment_id = read_segment_id(cm, xd, mi_row, mi_col, r, 1); + set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id); + return segment_id; + } + } + + if (seg->temporal_update) { + const int ctx = av1_get_pred_context_seg_id(xd); + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + struct segmentation_probs *const segp = &ec_ctx->seg; + aom_cdf_prob *pred_cdf = segp->pred_cdf[ctx]; + mbmi->seg_id_predicted = aom_read_symbol(r, pred_cdf, 2, ACCT_STR); + if (mbmi->seg_id_predicted) { + segment_id = get_predicted_segment_id(cm, mi_offset, x_mis, y_mis); + } else { + segment_id = read_segment_id(cm, xd, mi_row, mi_col, r, 0); + } + } else { + segment_id = read_segment_id(cm, xd, mi_row, mi_col, r, 0); + } + set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id); + return segment_id; +} + +static int read_skip_mode(AV1_COMMON *cm, const MACROBLOCKD *xd, int segment_id, + aom_reader *r) { + if (!cm->skip_mode_flag) return 0; + + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) { + return 0; + } + + if (!is_comp_ref_allowed(xd->mi[0]->sb_type)) return 0; + + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME) || + segfeature_active(&cm->seg, segment_id, SEG_LVL_GLOBALMV)) { + // These features imply single-reference mode, while skip mode implies + // compound reference. Hence, the two are mutually exclusive. + // In other words, skip_mode is implicitly 0 here. + return 0; + } + + const int ctx = av1_get_skip_mode_context(xd); + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + const int skip_mode = + aom_read_symbol(r, ec_ctx->skip_mode_cdfs[ctx], 2, ACCT_STR); + return skip_mode; +} + +static int read_skip(AV1_COMMON *cm, const MACROBLOCKD *xd, int segment_id, + aom_reader *r) { + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) { + return 1; + } else { + const int ctx = av1_get_skip_context(xd); + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + const int skip = aom_read_symbol(r, ec_ctx->skip_cdfs[ctx], 2, ACCT_STR); + return skip; + } +} + +// Merge the sorted list of cached colors(cached_colors[0...n_cached_colors-1]) +// and the sorted list of transmitted colors(colors[n_cached_colors...n-1]) into +// one single sorted list(colors[...]). +static void merge_colors(uint16_t *colors, uint16_t *cached_colors, + int n_colors, int n_cached_colors) { + if (n_cached_colors == 0) return; + int cache_idx = 0, trans_idx = n_cached_colors; + for (int i = 0; i < n_colors; ++i) { + if (cache_idx < n_cached_colors && + (trans_idx >= n_colors || + cached_colors[cache_idx] <= colors[trans_idx])) { + colors[i] = cached_colors[cache_idx++]; + } else { + assert(trans_idx < n_colors); + colors[i] = colors[trans_idx++]; + } + } +} + +static void read_palette_colors_y(MACROBLOCKD *const xd, int bit_depth, + PALETTE_MODE_INFO *const pmi, aom_reader *r) { + uint16_t color_cache[2 * PALETTE_MAX_SIZE]; + uint16_t cached_colors[PALETTE_MAX_SIZE]; + const int n_cache = av1_get_palette_cache(xd, 0, color_cache); + const int n = pmi->palette_size[0]; + int idx = 0; + for (int i = 0; i < n_cache && idx < n; ++i) + if (aom_read_bit(r, ACCT_STR)) cached_colors[idx++] = color_cache[i]; + if (idx < n) { + const int n_cached_colors = idx; + pmi->palette_colors[idx++] = aom_read_literal(r, bit_depth, ACCT_STR); + if (idx < n) { + const int min_bits = bit_depth - 3; + int bits = min_bits + aom_read_literal(r, 2, ACCT_STR); + int range = (1 << bit_depth) - pmi->palette_colors[idx - 1] - 1; + for (; idx < n; ++idx) { + assert(range >= 0); + const int delta = aom_read_literal(r, bits, ACCT_STR) + 1; + pmi->palette_colors[idx] = clamp(pmi->palette_colors[idx - 1] + delta, + 0, (1 << bit_depth) - 1); + range -= (pmi->palette_colors[idx] - pmi->palette_colors[idx - 1]); + bits = AOMMIN(bits, av1_ceil_log2(range)); + } + } + merge_colors(pmi->palette_colors, cached_colors, n, n_cached_colors); + } else { + memcpy(pmi->palette_colors, cached_colors, n * sizeof(cached_colors[0])); + } +} + +static void read_palette_colors_uv(MACROBLOCKD *const xd, int bit_depth, + PALETTE_MODE_INFO *const pmi, + aom_reader *r) { + const int n = pmi->palette_size[1]; + // U channel colors. + uint16_t color_cache[2 * PALETTE_MAX_SIZE]; + uint16_t cached_colors[PALETTE_MAX_SIZE]; + const int n_cache = av1_get_palette_cache(xd, 1, color_cache); + int idx = 0; + for (int i = 0; i < n_cache && idx < n; ++i) + if (aom_read_bit(r, ACCT_STR)) cached_colors[idx++] = color_cache[i]; + if (idx < n) { + const int n_cached_colors = idx; + idx += PALETTE_MAX_SIZE; + pmi->palette_colors[idx++] = aom_read_literal(r, bit_depth, ACCT_STR); + if (idx < PALETTE_MAX_SIZE + n) { + const int min_bits = bit_depth - 3; + int bits = min_bits + aom_read_literal(r, 2, ACCT_STR); + int range = (1 << bit_depth) - pmi->palette_colors[idx - 1]; + for (; idx < PALETTE_MAX_SIZE + n; ++idx) { + assert(range >= 0); + const int delta = aom_read_literal(r, bits, ACCT_STR); + pmi->palette_colors[idx] = clamp(pmi->palette_colors[idx - 1] + delta, + 0, (1 << bit_depth) - 1); + range -= (pmi->palette_colors[idx] - pmi->palette_colors[idx - 1]); + bits = AOMMIN(bits, av1_ceil_log2(range)); + } + } + merge_colors(pmi->palette_colors + PALETTE_MAX_SIZE, cached_colors, n, + n_cached_colors); + } else { + memcpy(pmi->palette_colors + PALETTE_MAX_SIZE, cached_colors, + n * sizeof(cached_colors[0])); + } + + // V channel colors. + if (aom_read_bit(r, ACCT_STR)) { // Delta encoding. + const int min_bits_v = bit_depth - 4; + const int max_val = 1 << bit_depth; + int bits = min_bits_v + aom_read_literal(r, 2, ACCT_STR); + pmi->palette_colors[2 * PALETTE_MAX_SIZE] = + aom_read_literal(r, bit_depth, ACCT_STR); + for (int i = 1; i < n; ++i) { + int delta = aom_read_literal(r, bits, ACCT_STR); + if (delta && aom_read_bit(r, ACCT_STR)) delta = -delta; + int val = (int)pmi->palette_colors[2 * PALETTE_MAX_SIZE + i - 1] + delta; + if (val < 0) val += max_val; + if (val >= max_val) val -= max_val; + pmi->palette_colors[2 * PALETTE_MAX_SIZE + i] = val; + } + } else { + for (int i = 0; i < n; ++i) { + pmi->palette_colors[2 * PALETTE_MAX_SIZE + i] = + aom_read_literal(r, bit_depth, ACCT_STR); + } + } +} + +static void read_palette_mode_info(AV1_COMMON *const cm, MACROBLOCKD *const xd, + int mi_row, int mi_col, aom_reader *r) { + const int num_planes = av1_num_planes(cm); + MB_MODE_INFO *const mbmi = xd->mi[0]; + const BLOCK_SIZE bsize = mbmi->sb_type; + assert(av1_allow_palette(cm->allow_screen_content_tools, bsize)); + PALETTE_MODE_INFO *const pmi = &mbmi->palette_mode_info; + const int bsize_ctx = av1_get_palette_bsize_ctx(bsize); + + if (mbmi->mode == DC_PRED) { + const int palette_mode_ctx = av1_get_palette_mode_ctx(xd); + const int modev = aom_read_symbol( + r, xd->tile_ctx->palette_y_mode_cdf[bsize_ctx][palette_mode_ctx], 2, + ACCT_STR); + if (modev) { + pmi->palette_size[0] = + aom_read_symbol(r, xd->tile_ctx->palette_y_size_cdf[bsize_ctx], + PALETTE_SIZES, ACCT_STR) + + 2; + read_palette_colors_y(xd, cm->seq_params.bit_depth, pmi, r); + } + } + if (num_planes > 1 && mbmi->uv_mode == UV_DC_PRED && + is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x, + xd->plane[1].subsampling_y)) { + const int palette_uv_mode_ctx = (pmi->palette_size[0] > 0); + const int modev = aom_read_symbol( + r, xd->tile_ctx->palette_uv_mode_cdf[palette_uv_mode_ctx], 2, ACCT_STR); + if (modev) { + pmi->palette_size[1] = + aom_read_symbol(r, xd->tile_ctx->palette_uv_size_cdf[bsize_ctx], + PALETTE_SIZES, ACCT_STR) + + 2; + read_palette_colors_uv(xd, cm->seq_params.bit_depth, pmi, r); + } + } +} + +static int read_angle_delta(aom_reader *r, aom_cdf_prob *cdf) { + const int sym = aom_read_symbol(r, cdf, 2 * MAX_ANGLE_DELTA + 1, ACCT_STR); + return sym - MAX_ANGLE_DELTA; +} + +static void read_filter_intra_mode_info(const AV1_COMMON *const cm, + MACROBLOCKD *const xd, aom_reader *r) { + MB_MODE_INFO *const mbmi = xd->mi[0]; + FILTER_INTRA_MODE_INFO *filter_intra_mode_info = + &mbmi->filter_intra_mode_info; + + if (av1_filter_intra_allowed(cm, mbmi)) { + filter_intra_mode_info->use_filter_intra = aom_read_symbol( + r, xd->tile_ctx->filter_intra_cdfs[mbmi->sb_type], 2, ACCT_STR); + if (filter_intra_mode_info->use_filter_intra) { + filter_intra_mode_info->filter_intra_mode = aom_read_symbol( + r, xd->tile_ctx->filter_intra_mode_cdf, FILTER_INTRA_MODES, ACCT_STR); + } + } else { + filter_intra_mode_info->use_filter_intra = 0; + } +} + +void av1_read_tx_type(const AV1_COMMON *const cm, MACROBLOCKD *xd, int blk_row, + int blk_col, TX_SIZE tx_size, aom_reader *r) { + MB_MODE_INFO *mbmi = xd->mi[0]; + const int txk_type_idx = + av1_get_txk_type_index(mbmi->sb_type, blk_row, blk_col); + TX_TYPE *tx_type = &mbmi->txk_type[txk_type_idx]; + *tx_type = DCT_DCT; + + // No need to read transform type if block is skipped. + if (mbmi->skip || segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) + return; + + // No need to read transform type for lossless mode(qindex==0). + const int qindex = + cm->seg.enabled ? xd->qindex[mbmi->segment_id] : cm->base_qindex; + if (qindex <= 0) return; + + const int inter_block = is_inter_block(mbmi); + if (get_ext_tx_types(tx_size, inter_block, cm->reduced_tx_set_used) > 1) { + const TxSetType tx_set_type = + av1_get_ext_tx_set_type(tx_size, inter_block, cm->reduced_tx_set_used); + const int eset = + get_ext_tx_set(tx_size, inter_block, cm->reduced_tx_set_used); + // eset == 0 should correspond to a set with only DCT_DCT and + // there is no need to read the tx_type + assert(eset != 0); + + const TX_SIZE square_tx_size = txsize_sqr_map[tx_size]; + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + if (inter_block) { + *tx_type = av1_ext_tx_inv[tx_set_type][aom_read_symbol( + r, ec_ctx->inter_ext_tx_cdf[eset][square_tx_size], + av1_num_ext_tx_set[tx_set_type], ACCT_STR)]; + } else { + const PREDICTION_MODE intra_mode = + mbmi->filter_intra_mode_info.use_filter_intra + ? fimode_to_intradir[mbmi->filter_intra_mode_info + .filter_intra_mode] + : mbmi->mode; + *tx_type = av1_ext_tx_inv[tx_set_type][aom_read_symbol( + r, ec_ctx->intra_ext_tx_cdf[eset][square_tx_size][intra_mode], + av1_num_ext_tx_set[tx_set_type], ACCT_STR)]; + } + } +} + +static INLINE void read_mv(aom_reader *r, MV *mv, const MV *ref, + nmv_context *ctx, MvSubpelPrecision precision); + +static INLINE int is_mv_valid(const MV *mv); + +static INLINE int assign_dv(AV1_COMMON *cm, MACROBLOCKD *xd, int_mv *mv, + const int_mv *ref_mv, int mi_row, int mi_col, + BLOCK_SIZE bsize, aom_reader *r) { + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + read_mv(r, &mv->as_mv, &ref_mv->as_mv, &ec_ctx->ndvc, MV_SUBPEL_NONE); + // DV should not have sub-pel. + assert((mv->as_mv.col & 7) == 0); + assert((mv->as_mv.row & 7) == 0); + mv->as_mv.col = (mv->as_mv.col >> 3) * 8; + mv->as_mv.row = (mv->as_mv.row >> 3) * 8; + int valid = is_mv_valid(&mv->as_mv) && + av1_is_dv_valid(mv->as_mv, cm, xd, mi_row, mi_col, bsize, + cm->seq_params.mib_size_log2); + return valid; +} + +static void read_intrabc_info(AV1_COMMON *const cm, MACROBLOCKD *const xd, + int mi_row, int mi_col, aom_reader *r) { + MB_MODE_INFO *const mbmi = xd->mi[0]; + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + mbmi->use_intrabc = aom_read_symbol(r, ec_ctx->intrabc_cdf, 2, ACCT_STR); + if (mbmi->use_intrabc) { + BLOCK_SIZE bsize = mbmi->sb_type; + mbmi->mode = DC_PRED; + mbmi->uv_mode = UV_DC_PRED; + mbmi->interp_filters = av1_broadcast_interp_filter(BILINEAR); + mbmi->motion_mode = SIMPLE_TRANSLATION; + + int16_t inter_mode_ctx[MODE_CTX_REF_FRAMES]; + int_mv ref_mvs[INTRA_FRAME + 1][MAX_MV_REF_CANDIDATES]; + int_mv global_mvs[REF_FRAMES]; + + av1_find_mv_refs(cm, xd, mbmi, INTRA_FRAME, xd->ref_mv_count, + xd->ref_mv_stack, ref_mvs, global_mvs, mi_row, mi_col, + inter_mode_ctx); + + int_mv nearestmv, nearmv; + + av1_find_best_ref_mvs(0, ref_mvs[INTRA_FRAME], &nearestmv, &nearmv, 0); + int_mv dv_ref = nearestmv.as_int == 0 ? nearmv : nearestmv; + if (dv_ref.as_int == 0) + av1_find_ref_dv(&dv_ref, &xd->tile, cm->seq_params.mib_size, mi_row, + mi_col); + // Ref DV should not have sub-pel. + int valid_dv = (dv_ref.as_mv.col & 7) == 0 && (dv_ref.as_mv.row & 7) == 0; + dv_ref.as_mv.col = (dv_ref.as_mv.col >> 3) * 8; + dv_ref.as_mv.row = (dv_ref.as_mv.row >> 3) * 8; + valid_dv = valid_dv && assign_dv(cm, xd, &mbmi->mv[0], &dv_ref, mi_row, + mi_col, bsize, r); + if (!valid_dv) { + // Intra bc motion vectors are not valid - signal corrupt frame + aom_merge_corrupted_flag(&xd->corrupted, 1); + } + } +} + +// If delta q is present, reads delta_q index. +// Also reads delta_q loop filter levels, if present. +static void read_delta_q_params(AV1_COMMON *const cm, MACROBLOCKD *const xd, + const int mi_row, const int mi_col, + aom_reader *r) { + if (cm->delta_q_present_flag) { + MB_MODE_INFO *const mbmi = xd->mi[0]; + xd->current_qindex += + read_delta_qindex(cm, xd, r, mbmi, mi_col, mi_row) * cm->delta_q_res; + /* Normative: Clamp to [1,MAXQ] to not interfere with lossless mode */ + xd->current_qindex = clamp(xd->current_qindex, 1, MAXQ); + FRAME_CONTEXT *const ec_ctx = xd->tile_ctx; + if (cm->delta_lf_present_flag) { + if (cm->delta_lf_multi) { + const int frame_lf_count = + av1_num_planes(cm) > 1 ? FRAME_LF_COUNT : FRAME_LF_COUNT - 2; + for (int lf_id = 0; lf_id < frame_lf_count; ++lf_id) { + const int tmp_lvl = + xd->delta_lf[lf_id] + + read_delta_lflevel(cm, r, ec_ctx->delta_lf_multi_cdf[lf_id], mbmi, + mi_col, mi_row) * + cm->delta_lf_res; + mbmi->delta_lf[lf_id] = xd->delta_lf[lf_id] = + clamp(tmp_lvl, -MAX_LOOP_FILTER, MAX_LOOP_FILTER); + } + } else { + const int tmp_lvl = xd->delta_lf_from_base + + read_delta_lflevel(cm, r, ec_ctx->delta_lf_cdf, + mbmi, mi_col, mi_row) * + cm->delta_lf_res; + mbmi->delta_lf_from_base = xd->delta_lf_from_base = + clamp(tmp_lvl, -MAX_LOOP_FILTER, MAX_LOOP_FILTER); + } + } + } +} + +static void read_intra_frame_mode_info(AV1_COMMON *const cm, + MACROBLOCKD *const xd, int mi_row, + int mi_col, aom_reader *r) { + MB_MODE_INFO *const mbmi = xd->mi[0]; + const MB_MODE_INFO *above_mi = xd->above_mbmi; + const MB_MODE_INFO *left_mi = xd->left_mbmi; + const BLOCK_SIZE bsize = mbmi->sb_type; + struct segmentation *const seg = &cm->seg; + + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + + if (seg->segid_preskip) + mbmi->segment_id = + read_intra_segment_id(cm, xd, mi_row, mi_col, bsize, r, 0); + + mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r); + + if (!seg->segid_preskip) + mbmi->segment_id = + read_intra_segment_id(cm, xd, mi_row, mi_col, bsize, r, mbmi->skip); + + read_cdef(cm, r, xd, mi_col, mi_row); + + read_delta_q_params(cm, xd, mi_row, mi_col, r); + + mbmi->current_qindex = xd->current_qindex; + + mbmi->ref_frame[0] = INTRA_FRAME; + mbmi->ref_frame[1] = NONE_FRAME; + mbmi->palette_mode_info.palette_size[0] = 0; + mbmi->palette_mode_info.palette_size[1] = 0; + mbmi->filter_intra_mode_info.use_filter_intra = 0; + + xd->above_txfm_context = cm->above_txfm_context[xd->tile.tile_row] + mi_col; + xd->left_txfm_context = + xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK); + + if (av1_allow_intrabc(cm)) { + read_intrabc_info(cm, xd, mi_row, mi_col, r); + if (is_intrabc_block(mbmi)) return; + } + + mbmi->mode = read_intra_mode(r, get_y_mode_cdf(ec_ctx, above_mi, left_mi)); + + const int use_angle_delta = av1_use_angle_delta(bsize); + mbmi->angle_delta[PLANE_TYPE_Y] = + (use_angle_delta && av1_is_directional_mode(mbmi->mode)) + ? read_angle_delta(r, ec_ctx->angle_delta_cdf[mbmi->mode - V_PRED]) + : 0; + + if (!cm->seq_params.monochrome && + is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x, + xd->plane[1].subsampling_y)) { + xd->cfl.is_chroma_reference = 1; + mbmi->uv_mode = + read_intra_mode_uv(ec_ctx, r, is_cfl_allowed(xd), mbmi->mode); + if (mbmi->uv_mode == UV_CFL_PRED) { + mbmi->cfl_alpha_idx = read_cfl_alphas(ec_ctx, r, &mbmi->cfl_alpha_signs); + } + mbmi->angle_delta[PLANE_TYPE_UV] = + (use_angle_delta && av1_is_directional_mode(get_uv_mode(mbmi->uv_mode))) + ? read_angle_delta(r, + ec_ctx->angle_delta_cdf[mbmi->uv_mode - V_PRED]) + : 0; + } else { + // Avoid decoding angle_info if there is is no chroma prediction + mbmi->uv_mode = UV_DC_PRED; + xd->cfl.is_chroma_reference = 0; + } + xd->cfl.store_y = store_cfl_required(cm, xd); + + if (av1_allow_palette(cm->allow_screen_content_tools, bsize)) + read_palette_mode_info(cm, xd, mi_row, mi_col, r); + + read_filter_intra_mode_info(cm, xd, r); +} + +static int read_mv_component(aom_reader *r, nmv_component *mvcomp, + int use_subpel, int usehp) { + int mag, d, fr, hp; + const int sign = aom_read_symbol(r, mvcomp->sign_cdf, 2, ACCT_STR); + const int mv_class = + aom_read_symbol(r, mvcomp->classes_cdf, MV_CLASSES, ACCT_STR); + const int class0 = mv_class == MV_CLASS_0; + + // Integer part + if (class0) { + d = aom_read_symbol(r, mvcomp->class0_cdf, CLASS0_SIZE, ACCT_STR); + mag = 0; + } else { + const int n = mv_class + CLASS0_BITS - 1; // number of bits + d = 0; + for (int i = 0; i < n; ++i) + d |= aom_read_symbol(r, mvcomp->bits_cdf[i], 2, ACCT_STR) << i; + mag = CLASS0_SIZE << (mv_class + 2); + } + + if (use_subpel) { + // Fractional part + fr = aom_read_symbol(r, class0 ? mvcomp->class0_fp_cdf[d] : mvcomp->fp_cdf, + MV_FP_SIZE, ACCT_STR); + + // High precision part (if hp is not used, the default value of the hp is 1) + hp = usehp ? aom_read_symbol( + r, class0 ? mvcomp->class0_hp_cdf : mvcomp->hp_cdf, 2, + ACCT_STR) + : 1; + } else { + fr = 3; + hp = 1; + } + + // Result + mag += ((d << 3) | (fr << 1) | hp) + 1; + return sign ? -mag : mag; +} + +static INLINE void read_mv(aom_reader *r, MV *mv, const MV *ref, + nmv_context *ctx, MvSubpelPrecision precision) { + MV diff = kZeroMv; + const MV_JOINT_TYPE joint_type = + (MV_JOINT_TYPE)aom_read_symbol(r, ctx->joints_cdf, MV_JOINTS, ACCT_STR); + + if (mv_joint_vertical(joint_type)) + diff.row = read_mv_component(r, &ctx->comps[0], precision > MV_SUBPEL_NONE, + precision > MV_SUBPEL_LOW_PRECISION); + + if (mv_joint_horizontal(joint_type)) + diff.col = read_mv_component(r, &ctx->comps[1], precision > MV_SUBPEL_NONE, + precision > MV_SUBPEL_LOW_PRECISION); + + mv->row = ref->row + diff.row; + mv->col = ref->col + diff.col; +} + +static REFERENCE_MODE read_block_reference_mode(AV1_COMMON *cm, + const MACROBLOCKD *xd, + aom_reader *r) { + if (!is_comp_ref_allowed(xd->mi[0]->sb_type)) return SINGLE_REFERENCE; + if (cm->reference_mode == REFERENCE_MODE_SELECT) { + const int ctx = av1_get_reference_mode_context(xd); + const REFERENCE_MODE mode = (REFERENCE_MODE)aom_read_symbol( + r, xd->tile_ctx->comp_inter_cdf[ctx], 2, ACCT_STR); + return mode; // SINGLE_REFERENCE or COMPOUND_REFERENCE + } else { + assert(cm->reference_mode == SINGLE_REFERENCE); + return cm->reference_mode; + } +} + +#define READ_REF_BIT(pname) \ + aom_read_symbol(r, av1_get_pred_cdf_##pname(xd), 2, ACCT_STR) + +static COMP_REFERENCE_TYPE read_comp_reference_type(const MACROBLOCKD *xd, + aom_reader *r) { + const int ctx = av1_get_comp_reference_type_context(xd); + const COMP_REFERENCE_TYPE comp_ref_type = + (COMP_REFERENCE_TYPE)aom_read_symbol( + r, xd->tile_ctx->comp_ref_type_cdf[ctx], 2, ACCT_STR); + return comp_ref_type; // UNIDIR_COMP_REFERENCE or BIDIR_COMP_REFERENCE +} + +static void set_ref_frames_for_skip_mode(AV1_COMMON *const cm, + MV_REFERENCE_FRAME ref_frame[2]) { + ref_frame[0] = LAST_FRAME + cm->ref_frame_idx_0; + ref_frame[1] = LAST_FRAME + cm->ref_frame_idx_1; +} + +// Read the referncence frame +static void read_ref_frames(AV1_COMMON *const cm, MACROBLOCKD *const xd, + aom_reader *r, int segment_id, + MV_REFERENCE_FRAME ref_frame[2]) { + if (xd->mi[0]->skip_mode) { + set_ref_frames_for_skip_mode(cm, ref_frame); + return; + } + + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) { + ref_frame[0] = (MV_REFERENCE_FRAME)get_segdata(&cm->seg, segment_id, + SEG_LVL_REF_FRAME); + ref_frame[1] = NONE_FRAME; + } else if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP) || + segfeature_active(&cm->seg, segment_id, SEG_LVL_GLOBALMV)) { + ref_frame[0] = LAST_FRAME; + ref_frame[1] = NONE_FRAME; + } else { + const REFERENCE_MODE mode = read_block_reference_mode(cm, xd, r); + + if (mode == COMPOUND_REFERENCE) { + const COMP_REFERENCE_TYPE comp_ref_type = read_comp_reference_type(xd, r); + + if (comp_ref_type == UNIDIR_COMP_REFERENCE) { + const int bit = READ_REF_BIT(uni_comp_ref_p); + if (bit) { + ref_frame[0] = BWDREF_FRAME; + ref_frame[1] = ALTREF_FRAME; + } else { + const int bit1 = READ_REF_BIT(uni_comp_ref_p1); + if (bit1) { + const int bit2 = READ_REF_BIT(uni_comp_ref_p2); + if (bit2) { + ref_frame[0] = LAST_FRAME; + ref_frame[1] = GOLDEN_FRAME; + } else { + ref_frame[0] = LAST_FRAME; + ref_frame[1] = LAST3_FRAME; + } + } else { + ref_frame[0] = LAST_FRAME; + ref_frame[1] = LAST2_FRAME; + } + } + + return; + } + + assert(comp_ref_type == BIDIR_COMP_REFERENCE); + + const int idx = 1; + const int bit = READ_REF_BIT(comp_ref_p); + // Decode forward references. + if (!bit) { + const int bit1 = READ_REF_BIT(comp_ref_p1); + ref_frame[!idx] = cm->comp_fwd_ref[bit1 ? 1 : 0]; + } else { + const int bit2 = READ_REF_BIT(comp_ref_p2); + ref_frame[!idx] = cm->comp_fwd_ref[bit2 ? 3 : 2]; + } + + // Decode backward references. + const int bit_bwd = READ_REF_BIT(comp_bwdref_p); + if (!bit_bwd) { + const int bit1_bwd = READ_REF_BIT(comp_bwdref_p1); + ref_frame[idx] = cm->comp_bwd_ref[bit1_bwd]; + } else { + ref_frame[idx] = cm->comp_bwd_ref[2]; + } + } else if (mode == SINGLE_REFERENCE) { + const int bit0 = READ_REF_BIT(single_ref_p1); + if (bit0) { + const int bit1 = READ_REF_BIT(single_ref_p2); + if (!bit1) { + const int bit5 = READ_REF_BIT(single_ref_p6); + ref_frame[0] = bit5 ? ALTREF2_FRAME : BWDREF_FRAME; + } else { + ref_frame[0] = ALTREF_FRAME; + } + } else { + const int bit2 = READ_REF_BIT(single_ref_p3); + if (bit2) { + const int bit4 = READ_REF_BIT(single_ref_p5); + ref_frame[0] = bit4 ? GOLDEN_FRAME : LAST3_FRAME; + } else { + const int bit3 = READ_REF_BIT(single_ref_p4); + ref_frame[0] = bit3 ? LAST2_FRAME : LAST_FRAME; + } + } + + ref_frame[1] = NONE_FRAME; + } else { + assert(0 && "Invalid prediction mode."); + } + } +} + +static INLINE void read_mb_interp_filter(AV1_COMMON *const cm, + MACROBLOCKD *const xd, + MB_MODE_INFO *const mbmi, + aom_reader *r) { + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + + if (!av1_is_interp_needed(xd)) { + set_default_interp_filters(mbmi, cm->interp_filter); + return; + } + + if (cm->interp_filter != SWITCHABLE) { + mbmi->interp_filters = av1_broadcast_interp_filter(cm->interp_filter); + } else { + InterpFilter ref0_filter[2] = { EIGHTTAP_REGULAR, EIGHTTAP_REGULAR }; + for (int dir = 0; dir < 2; ++dir) { + const int ctx = av1_get_pred_context_switchable_interp(xd, dir); + ref0_filter[dir] = (InterpFilter)aom_read_symbol( + r, ec_ctx->switchable_interp_cdf[ctx], SWITCHABLE_FILTERS, ACCT_STR); + if (cm->seq_params.enable_dual_filter == 0) { + ref0_filter[1] = ref0_filter[0]; + break; + } + } + // The index system works as: (0, 1) -> (vertical, horizontal) filter types + mbmi->interp_filters = + av1_make_interp_filters(ref0_filter[0], ref0_filter[1]); + } +} + +static void read_intra_block_mode_info(AV1_COMMON *const cm, const int mi_row, + const int mi_col, MACROBLOCKD *const xd, + MB_MODE_INFO *const mbmi, + aom_reader *r) { + const BLOCK_SIZE bsize = mbmi->sb_type; + const int use_angle_delta = av1_use_angle_delta(bsize); + + mbmi->ref_frame[0] = INTRA_FRAME; + mbmi->ref_frame[1] = NONE_FRAME; + + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + + mbmi->mode = read_intra_mode(r, ec_ctx->y_mode_cdf[size_group_lookup[bsize]]); + + mbmi->angle_delta[PLANE_TYPE_Y] = + use_angle_delta && av1_is_directional_mode(mbmi->mode) + ? read_angle_delta(r, ec_ctx->angle_delta_cdf[mbmi->mode - V_PRED]) + : 0; + const int has_chroma = + is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x, + xd->plane[1].subsampling_y); + xd->cfl.is_chroma_reference = has_chroma; + if (!cm->seq_params.monochrome && has_chroma) { + mbmi->uv_mode = + read_intra_mode_uv(ec_ctx, r, is_cfl_allowed(xd), mbmi->mode); + if (mbmi->uv_mode == UV_CFL_PRED) { + mbmi->cfl_alpha_idx = + read_cfl_alphas(xd->tile_ctx, r, &mbmi->cfl_alpha_signs); + } + mbmi->angle_delta[PLANE_TYPE_UV] = + use_angle_delta && av1_is_directional_mode(get_uv_mode(mbmi->uv_mode)) + ? read_angle_delta(r, + ec_ctx->angle_delta_cdf[mbmi->uv_mode - V_PRED]) + : 0; + } else { + // Avoid decoding angle_info if there is is no chroma prediction + mbmi->uv_mode = UV_DC_PRED; + } + xd->cfl.store_y = store_cfl_required(cm, xd); + + mbmi->palette_mode_info.palette_size[0] = 0; + mbmi->palette_mode_info.palette_size[1] = 0; + if (av1_allow_palette(cm->allow_screen_content_tools, bsize)) + read_palette_mode_info(cm, xd, mi_row, mi_col, r); + + read_filter_intra_mode_info(cm, xd, r); +} + +static INLINE int is_mv_valid(const MV *mv) { + return mv->row > MV_LOW && mv->row < MV_UPP && mv->col > MV_LOW && + mv->col < MV_UPP; +} + +static INLINE int assign_mv(AV1_COMMON *cm, MACROBLOCKD *xd, + PREDICTION_MODE mode, + MV_REFERENCE_FRAME ref_frame[2], int_mv mv[2], + int_mv ref_mv[2], int_mv nearest_mv[2], + int_mv near_mv[2], int mi_row, int mi_col, + int is_compound, int allow_hp, aom_reader *r) { + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + MB_MODE_INFO *mbmi = xd->mi[0]; + BLOCK_SIZE bsize = mbmi->sb_type; + if (cm->cur_frame_force_integer_mv) { + allow_hp = MV_SUBPEL_NONE; + } + switch (mode) { + case NEWMV: { + nmv_context *const nmvc = &ec_ctx->nmvc; + read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv, nmvc, allow_hp); + break; + } + case NEARESTMV: { + mv[0].as_int = nearest_mv[0].as_int; + break; + } + case NEARMV: { + mv[0].as_int = near_mv[0].as_int; + break; + } + case GLOBALMV: { + mv[0].as_int = + gm_get_motion_vector(&cm->global_motion[ref_frame[0]], + cm->allow_high_precision_mv, bsize, mi_col, + mi_row, cm->cur_frame_force_integer_mv) + .as_int; + break; + } + case NEW_NEWMV: { + assert(is_compound); + for (int i = 0; i < 2; ++i) { + nmv_context *const nmvc = &ec_ctx->nmvc; + read_mv(r, &mv[i].as_mv, &ref_mv[i].as_mv, nmvc, allow_hp); + } + break; + } + case NEAREST_NEARESTMV: { + assert(is_compound); + mv[0].as_int = nearest_mv[0].as_int; + mv[1].as_int = nearest_mv[1].as_int; + break; + } + case NEAR_NEARMV: { + assert(is_compound); + mv[0].as_int = near_mv[0].as_int; + mv[1].as_int = near_mv[1].as_int; + break; + } + case NEW_NEARESTMV: { + nmv_context *const nmvc = &ec_ctx->nmvc; + read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv, nmvc, allow_hp); + assert(is_compound); + mv[1].as_int = nearest_mv[1].as_int; + break; + } + case NEAREST_NEWMV: { + nmv_context *const nmvc = &ec_ctx->nmvc; + mv[0].as_int = nearest_mv[0].as_int; + read_mv(r, &mv[1].as_mv, &ref_mv[1].as_mv, nmvc, allow_hp); + assert(is_compound); + break; + } + case NEAR_NEWMV: { + nmv_context *const nmvc = &ec_ctx->nmvc; + mv[0].as_int = near_mv[0].as_int; + read_mv(r, &mv[1].as_mv, &ref_mv[1].as_mv, nmvc, allow_hp); + assert(is_compound); + break; + } + case NEW_NEARMV: { + nmv_context *const nmvc = &ec_ctx->nmvc; + read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv, nmvc, allow_hp); + assert(is_compound); + mv[1].as_int = near_mv[1].as_int; + break; + } + case GLOBAL_GLOBALMV: { + assert(is_compound); + mv[0].as_int = + gm_get_motion_vector(&cm->global_motion[ref_frame[0]], + cm->allow_high_precision_mv, bsize, mi_col, + mi_row, cm->cur_frame_force_integer_mv) + .as_int; + mv[1].as_int = + gm_get_motion_vector(&cm->global_motion[ref_frame[1]], + cm->allow_high_precision_mv, bsize, mi_col, + mi_row, cm->cur_frame_force_integer_mv) + .as_int; + break; + } + default: { return 0; } + } + + int ret = is_mv_valid(&mv[0].as_mv); + if (is_compound) { + ret = ret && is_mv_valid(&mv[1].as_mv); + } + return ret; +} + +static int read_is_inter_block(AV1_COMMON *const cm, MACROBLOCKD *const xd, + int segment_id, aom_reader *r) { + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) { + const int frame = get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME); + if (frame < LAST_FRAME) return 0; + return frame != INTRA_FRAME; + } + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_GLOBALMV)) { + return 1; + } + const int ctx = av1_get_intra_inter_context(xd); + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + const int is_inter = + aom_read_symbol(r, ec_ctx->intra_inter_cdf[ctx], 2, ACCT_STR); + return is_inter; +} + +#if DEC_MISMATCH_DEBUG +static void dec_dump_logs(AV1_COMMON *cm, MB_MODE_INFO *const mbmi, int mi_row, + int mi_col, int16_t mode_ctx) { + int_mv mv[2] = { { 0 } }; + for (int ref = 0; ref < 1 + has_second_ref(mbmi); ++ref) + mv[ref].as_mv = mbmi->mv[ref].as_mv; + + const int16_t newmv_ctx = mode_ctx & NEWMV_CTX_MASK; + int16_t zeromv_ctx = -1; + int16_t refmv_ctx = -1; + if (mbmi->mode != NEWMV) { + zeromv_ctx = (mode_ctx >> GLOBALMV_OFFSET) & GLOBALMV_CTX_MASK; + if (mbmi->mode != GLOBALMV) + refmv_ctx = (mode_ctx >> REFMV_OFFSET) & REFMV_CTX_MASK; + } + +#define FRAME_TO_CHECK 11 + if (cm->current_video_frame == FRAME_TO_CHECK && cm->show_frame == 1) { + printf( + "=== DECODER ===: " + "Frame=%d, (mi_row,mi_col)=(%d,%d), skip_mode=%d, mode=%d, bsize=%d, " + "show_frame=%d, mv[0]=(%d,%d), mv[1]=(%d,%d), ref[0]=%d, " + "ref[1]=%d, motion_mode=%d, mode_ctx=%d, " + "newmv_ctx=%d, zeromv_ctx=%d, refmv_ctx=%d, tx_size=%d\n", + cm->current_video_frame, mi_row, mi_col, mbmi->skip_mode, mbmi->mode, + mbmi->sb_type, cm->show_frame, mv[0].as_mv.row, mv[0].as_mv.col, + mv[1].as_mv.row, mv[1].as_mv.col, mbmi->ref_frame[0], + mbmi->ref_frame[1], mbmi->motion_mode, mode_ctx, newmv_ctx, zeromv_ctx, + refmv_ctx, mbmi->tx_size); + } +} +#endif // DEC_MISMATCH_DEBUG + +static void read_inter_block_mode_info(AV1Decoder *const pbi, + MACROBLOCKD *const xd, + MB_MODE_INFO *const mbmi, int mi_row, + int mi_col, aom_reader *r) { + AV1_COMMON *const cm = &pbi->common; + const BLOCK_SIZE bsize = mbmi->sb_type; + const int allow_hp = cm->allow_high_precision_mv; + int_mv nearestmv[2], nearmv[2]; + int_mv ref_mvs[MODE_CTX_REF_FRAMES][MAX_MV_REF_CANDIDATES] = { { { 0 } } }; + int16_t inter_mode_ctx[MODE_CTX_REF_FRAMES]; + int pts[SAMPLES_ARRAY_SIZE], pts_inref[SAMPLES_ARRAY_SIZE]; + FRAME_CONTEXT *ec_ctx = xd->tile_ctx; + + mbmi->uv_mode = UV_DC_PRED; + mbmi->palette_mode_info.palette_size[0] = 0; + mbmi->palette_mode_info.palette_size[1] = 0; + + av1_collect_neighbors_ref_counts(xd); + + read_ref_frames(cm, xd, r, mbmi->segment_id, mbmi->ref_frame); + const int is_compound = has_second_ref(mbmi); + + MV_REFERENCE_FRAME ref_frame = av1_ref_frame_type(mbmi->ref_frame); + int_mv global_mvs[REF_FRAMES]; + av1_find_mv_refs(cm, xd, mbmi, ref_frame, xd->ref_mv_count, xd->ref_mv_stack, + ref_mvs, global_mvs, mi_row, mi_col, inter_mode_ctx); + + int mode_ctx = av1_mode_context_analyzer(inter_mode_ctx, mbmi->ref_frame); + mbmi->ref_mv_idx = 0; + + if (mbmi->skip_mode) { + assert(is_compound); + mbmi->mode = NEAREST_NEARESTMV; + } else { + if (segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP) || + segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_GLOBALMV)) { + mbmi->mode = GLOBALMV; + } else { + if (is_compound) + mbmi->mode = read_inter_compound_mode(xd, r, mode_ctx); + else + mbmi->mode = read_inter_mode(ec_ctx, r, mode_ctx); + if (mbmi->mode == NEWMV || mbmi->mode == NEW_NEWMV || + have_nearmv_in_inter_mode(mbmi->mode)) + read_drl_idx(ec_ctx, xd, mbmi, r); + } + } + + if (is_compound != is_inter_compound_mode(mbmi->mode)) { + aom_internal_error(xd->error_info, AOM_CODEC_CORRUPT_FRAME, + "Prediction mode %d invalid with ref frame %d %d", + mbmi->mode, mbmi->ref_frame[0], mbmi->ref_frame[1]); + } + + if (!is_compound && mbmi->mode != GLOBALMV) { + av1_find_best_ref_mvs(allow_hp, ref_mvs[mbmi->ref_frame[0]], &nearestmv[0], + &nearmv[0], cm->cur_frame_force_integer_mv); + } + + if (is_compound && mbmi->mode != GLOBAL_GLOBALMV) { + int ref_mv_idx = mbmi->ref_mv_idx + 1; + nearestmv[0] = xd->ref_mv_stack[ref_frame][0].this_mv; + nearestmv[1] = xd->ref_mv_stack[ref_frame][0].comp_mv; + nearmv[0] = xd->ref_mv_stack[ref_frame][ref_mv_idx].this_mv; + nearmv[1] = xd->ref_mv_stack[ref_frame][ref_mv_idx].comp_mv; + lower_mv_precision(&nearestmv[0].as_mv, allow_hp, + cm->cur_frame_force_integer_mv); + lower_mv_precision(&nearestmv[1].as_mv, allow_hp, + cm->cur_frame_force_integer_mv); + lower_mv_precision(&nearmv[0].as_mv, allow_hp, + cm->cur_frame_force_integer_mv); + lower_mv_precision(&nearmv[1].as_mv, allow_hp, + cm->cur_frame_force_integer_mv); + } else if (mbmi->ref_mv_idx > 0 && mbmi->mode == NEARMV) { + int_mv cur_mv = + xd->ref_mv_stack[mbmi->ref_frame[0]][1 + mbmi->ref_mv_idx].this_mv; + nearmv[0] = cur_mv; + } + + int_mv ref_mv[2]; + ref_mv[0] = nearestmv[0]; + ref_mv[1] = nearestmv[1]; + + if (is_compound) { + int ref_mv_idx = mbmi->ref_mv_idx; + // Special case: NEAR_NEWMV and NEW_NEARMV modes use + // 1 + mbmi->ref_mv_idx (like NEARMV) instead of + // mbmi->ref_mv_idx (like NEWMV) + if (mbmi->mode == NEAR_NEWMV || mbmi->mode == NEW_NEARMV) + ref_mv_idx = 1 + mbmi->ref_mv_idx; + + // TODO(jingning, yunqing): Do we need a lower_mv_precision() call here? + if (compound_ref0_mode(mbmi->mode) == NEWMV) + ref_mv[0] = xd->ref_mv_stack[ref_frame][ref_mv_idx].this_mv; + + if (compound_ref1_mode(mbmi->mode) == NEWMV) + ref_mv[1] = xd->ref_mv_stack[ref_frame][ref_mv_idx].comp_mv; + } else { + if (mbmi->mode == NEWMV) { + if (xd->ref_mv_count[ref_frame] > 1) + ref_mv[0] = xd->ref_mv_stack[ref_frame][mbmi->ref_mv_idx].this_mv; + } + } + + if (mbmi->skip_mode) { + assert(mbmi->mode == NEAREST_NEARESTMV); + mbmi->mv[0].as_int = nearestmv[0].as_int; + mbmi->mv[1].as_int = nearestmv[1].as_int; + } else { + int mv_corrupted_flag = + !assign_mv(cm, xd, mbmi->mode, mbmi->ref_frame, mbmi->mv, ref_mv, + nearestmv, nearmv, mi_row, mi_col, is_compound, allow_hp, r); + aom_merge_corrupted_flag(&xd->corrupted, mv_corrupted_flag); + } + + mbmi->use_wedge_interintra = 0; + if (cm->seq_params.enable_interintra_compound && !mbmi->skip_mode && + is_interintra_allowed(mbmi)) { + const int bsize_group = size_group_lookup[bsize]; + const int interintra = + aom_read_symbol(r, ec_ctx->interintra_cdf[bsize_group], 2, ACCT_STR); + assert(mbmi->ref_frame[1] == NONE_FRAME); + if (interintra) { + const INTERINTRA_MODE interintra_mode = + read_interintra_mode(xd, r, bsize_group); + mbmi->ref_frame[1] = INTRA_FRAME; + mbmi->interintra_mode = interintra_mode; + mbmi->angle_delta[PLANE_TYPE_Y] = 0; + mbmi->angle_delta[PLANE_TYPE_UV] = 0; + mbmi->filter_intra_mode_info.use_filter_intra = 0; + if (is_interintra_wedge_used(bsize)) { + mbmi->use_wedge_interintra = aom_read_symbol( + r, ec_ctx->wedge_interintra_cdf[bsize], 2, ACCT_STR); + if (mbmi->use_wedge_interintra) { + mbmi->interintra_wedge_index = + aom_read_symbol(r, ec_ctx->wedge_idx_cdf[bsize], 16, ACCT_STR); + mbmi->interintra_wedge_sign = 0; + } + } + } + } + + for (int ref = 0; ref < 1 + has_second_ref(mbmi); ++ref) { + const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref]; + RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME]; + + xd->block_refs[ref] = ref_buf; + } + + mbmi->motion_mode = SIMPLE_TRANSLATION; + if (is_motion_variation_allowed_bsize(mbmi->sb_type) && !mbmi->skip_mode && + !has_second_ref(mbmi)) + mbmi->num_proj_ref = findSamples(cm, xd, mi_row, mi_col, pts, pts_inref); + av1_count_overlappable_neighbors(cm, xd, mi_row, mi_col); + + if (mbmi->ref_frame[1] != INTRA_FRAME) + mbmi->motion_mode = read_motion_mode(cm, xd, mbmi, r); + + // init + mbmi->comp_group_idx = 0; + mbmi->compound_idx = 1; + mbmi->interinter_comp.type = COMPOUND_AVERAGE; + + if (has_second_ref(mbmi) && !mbmi->skip_mode) { + // Read idx to indicate current compound inter prediction mode group + const int masked_compound_used = is_any_masked_compound_used(bsize) && + cm->seq_params.enable_masked_compound; + + if (masked_compound_used) { + const int ctx_comp_group_idx = get_comp_group_idx_context(xd); + mbmi->comp_group_idx = aom_read_symbol( + r, ec_ctx->comp_group_idx_cdf[ctx_comp_group_idx], 2, ACCT_STR); + } + + if (mbmi->comp_group_idx == 0) { + if (cm->seq_params.enable_jnt_comp) { + const int comp_index_ctx = get_comp_index_context(cm, xd); + mbmi->compound_idx = aom_read_symbol( + r, ec_ctx->compound_index_cdf[comp_index_ctx], 2, ACCT_STR); + } else { + // Distance-weighted compound is disabled, so always use average + mbmi->compound_idx = 1; + } + } else { + assert(cm->reference_mode != SINGLE_REFERENCE && + is_inter_compound_mode(mbmi->mode) && + mbmi->motion_mode == SIMPLE_TRANSLATION); + assert(masked_compound_used); + + // compound_diffwtd, wedge + if (is_interinter_compound_used(COMPOUND_WEDGE, bsize)) + mbmi->interinter_comp.type = + 1 + aom_read_symbol(r, ec_ctx->compound_type_cdf[bsize], + COMPOUND_TYPES - 1, ACCT_STR); + else + mbmi->interinter_comp.type = COMPOUND_DIFFWTD; + + if (mbmi->interinter_comp.type == COMPOUND_WEDGE) { + assert(is_interinter_compound_used(COMPOUND_WEDGE, bsize)); + mbmi->interinter_comp.wedge_index = + aom_read_symbol(r, ec_ctx->wedge_idx_cdf[bsize], 16, ACCT_STR); + mbmi->interinter_comp.wedge_sign = aom_read_bit(r, ACCT_STR); + } else { + assert(mbmi->interinter_comp.type == COMPOUND_DIFFWTD); + mbmi->interinter_comp.mask_type = + aom_read_literal(r, MAX_DIFFWTD_MASK_BITS, ACCT_STR); + } + } + } + + read_mb_interp_filter(cm, xd, mbmi, r); + + if (mbmi->motion_mode == WARPED_CAUSAL) { + mbmi->wm_params.wmtype = DEFAULT_WMTYPE; + mbmi->wm_params.invalid = 0; + + if (mbmi->num_proj_ref > 1) + mbmi->num_proj_ref = selectSamples(&mbmi->mv[0].as_mv, pts, pts_inref, + mbmi->num_proj_ref, bsize); + + if (find_projection(mbmi->num_proj_ref, pts, pts_inref, bsize, + mbmi->mv[0].as_mv.row, mbmi->mv[0].as_mv.col, + &mbmi->wm_params, mi_row, mi_col)) { +#if WARPED_MOTION_DEBUG + printf("Warning: unexpected warped model from aomenc\n"); +#endif + mbmi->wm_params.invalid = 1; + } + } + + xd->cfl.is_chroma_reference = + is_chroma_reference(mi_row, mi_col, bsize, cm->seq_params.subsampling_x, + cm->seq_params.subsampling_y); + xd->cfl.store_y = store_cfl_required(cm, xd); + +#if DEC_MISMATCH_DEBUG + dec_dump_logs(cm, mi, mi_row, mi_col, mode_ctx); +#endif // DEC_MISMATCH_DEBUG +} + +static void read_inter_frame_mode_info(AV1Decoder *const pbi, + MACROBLOCKD *const xd, int mi_row, + int mi_col, aom_reader *r) { + AV1_COMMON *const cm = &pbi->common; + MB_MODE_INFO *const mbmi = xd->mi[0]; + int inter_block = 1; + + mbmi->mv[0].as_int = 0; + mbmi->mv[1].as_int = 0; + mbmi->segment_id = read_inter_segment_id(cm, xd, mi_row, mi_col, 1, r); + + mbmi->skip_mode = read_skip_mode(cm, xd, mbmi->segment_id, r); + + if (mbmi->skip_mode) + mbmi->skip = 1; + else + mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r); + + mbmi->segment_id = read_inter_segment_id(cm, xd, mi_row, mi_col, 0, r); + + read_cdef(cm, r, xd, mi_col, mi_row); + + read_delta_q_params(cm, xd, mi_row, mi_col, r); + + if (!mbmi->skip_mode) + inter_block = read_is_inter_block(cm, xd, mbmi->segment_id, r); + + mbmi->current_qindex = xd->current_qindex; + + xd->above_txfm_context = cm->above_txfm_context[xd->tile.tile_row] + mi_col; + xd->left_txfm_context = + xd->left_txfm_context_buffer + (mi_row & MAX_MIB_MASK); + + if (inter_block) + read_inter_block_mode_info(pbi, xd, mbmi, mi_row, mi_col, r); + else + read_intra_block_mode_info(cm, mi_row, mi_col, xd, mbmi, r); +} + +static void intra_copy_frame_mvs(AV1_COMMON *const cm, int mi_row, int mi_col, + int x_mis, int y_mis) { + const int frame_mvs_stride = ROUND_POWER_OF_TWO(cm->mi_cols, 1); + MV_REF *frame_mvs = + cm->cur_frame->mvs + (mi_row >> 1) * frame_mvs_stride + (mi_col >> 1); + x_mis = ROUND_POWER_OF_TWO(x_mis, 1); + y_mis = ROUND_POWER_OF_TWO(y_mis, 1); + + for (int h = 0; h < y_mis; h++) { + MV_REF *mv = frame_mvs; + for (int w = 0; w < x_mis; w++) { + mv->ref_frame = NONE_FRAME; + mv++; + } + frame_mvs += frame_mvs_stride; + } +} + +void av1_read_mode_info(AV1Decoder *const pbi, MACROBLOCKD *xd, int mi_row, + int mi_col, aom_reader *r, int x_mis, int y_mis) { + AV1_COMMON *const cm = &pbi->common; + MB_MODE_INFO *const mi = xd->mi[0]; + mi->use_intrabc = 0; + + if (frame_is_intra_only(cm)) { + read_intra_frame_mode_info(cm, xd, mi_row, mi_col, r); + intra_copy_frame_mvs(cm, mi_row, mi_col, x_mis, y_mis); + } else { + read_inter_frame_mode_info(pbi, xd, mi_row, mi_col, r); + av1_copy_frame_mvs(cm, mi, mi_row, mi_col, x_mis, y_mis); + } +} |