diff options
Diffstat (limited to 'thirdparty/libvpx/vp9/decoder/vp9_decodemv.c')
| -rw-r--r-- | thirdparty/libvpx/vp9/decoder/vp9_decodemv.c | 911 |
1 files changed, 911 insertions, 0 deletions
diff --git a/thirdparty/libvpx/vp9/decoder/vp9_decodemv.c b/thirdparty/libvpx/vp9/decoder/vp9_decodemv.c new file mode 100644 index 0000000000..ffc6839ad1 --- /dev/null +++ b/thirdparty/libvpx/vp9/decoder/vp9_decodemv.c @@ -0,0 +1,911 @@ +/* + Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include <assert.h> + +#include "vp9/common/vp9_common.h" +#include "vp9/common/vp9_entropy.h" +#include "vp9/common/vp9_entropymode.h" +#include "vp9/common/vp9_entropymv.h" +#include "vp9/common/vp9_mvref_common.h" +#include "vp9/common/vp9_pred_common.h" +#include "vp9/common/vp9_reconinter.h" +#include "vp9/common/vp9_seg_common.h" + +#include "vp9/decoder/vp9_decodemv.h" +#include "vp9/decoder/vp9_decodeframe.h" + +#include "vpx_dsp/vpx_dsp_common.h" + +static PREDICTION_MODE read_intra_mode(vpx_reader *r, const vpx_prob *p) { + return (PREDICTION_MODE)vpx_read_tree(r, vp9_intra_mode_tree, p); +} + +static PREDICTION_MODE read_intra_mode_y(VP9_COMMON *cm, MACROBLOCKD *xd, + vpx_reader *r, int size_group) { + const PREDICTION_MODE y_mode = + read_intra_mode(r, cm->fc->y_mode_prob[size_group]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->y_mode[size_group][y_mode]; + return y_mode; +} + +static PREDICTION_MODE read_intra_mode_uv(VP9_COMMON *cm, MACROBLOCKD *xd, + vpx_reader *r, + PREDICTION_MODE y_mode) { + const PREDICTION_MODE uv_mode = read_intra_mode(r, + cm->fc->uv_mode_prob[y_mode]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->uv_mode[y_mode][uv_mode]; + return uv_mode; +} + +static PREDICTION_MODE read_inter_mode(VP9_COMMON *cm, MACROBLOCKD *xd, + vpx_reader *r, int ctx) { + const int mode = vpx_read_tree(r, vp9_inter_mode_tree, + cm->fc->inter_mode_probs[ctx]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->inter_mode[ctx][mode]; + + return NEARESTMV + mode; +} + +static int read_segment_id(vpx_reader *r, const struct segmentation *seg) { + return vpx_read_tree(r, vp9_segment_tree, seg->tree_probs); +} + +static TX_SIZE read_selected_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd, + TX_SIZE max_tx_size, vpx_reader *r) { + FRAME_COUNTS *counts = xd->counts; + const int ctx = get_tx_size_context(xd); + const vpx_prob *tx_probs = get_tx_probs(max_tx_size, ctx, &cm->fc->tx_probs); + int tx_size = vpx_read(r, tx_probs[0]); + if (tx_size != TX_4X4 && max_tx_size >= TX_16X16) { + tx_size += vpx_read(r, tx_probs[1]); + if (tx_size != TX_8X8 && max_tx_size >= TX_32X32) + tx_size += vpx_read(r, tx_probs[2]); + } + + if (counts) + ++get_tx_counts(max_tx_size, ctx, &counts->tx)[tx_size]; + return (TX_SIZE)tx_size; +} + +static INLINE TX_SIZE read_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd, + int allow_select, vpx_reader *r) { + TX_MODE tx_mode = cm->tx_mode; + BLOCK_SIZE bsize = xd->mi[0]->sb_type; + const TX_SIZE max_tx_size = max_txsize_lookup[bsize]; + if (allow_select && tx_mode == TX_MODE_SELECT && bsize >= BLOCK_8X8) + return read_selected_tx_size(cm, xd, max_tx_size, r); + else + return VPXMIN(max_tx_size, tx_mode_to_biggest_tx_size[tx_mode]); +} + +static int dec_get_segment_id(const VP9_COMMON *cm, const uint8_t *segment_ids, + int mi_offset, int x_mis, int y_mis) { + int x, y, segment_id = INT_MAX; + + for (y = 0; y < y_mis; y++) + for (x = 0; x < x_mis; x++) + segment_id = + VPXMIN(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(VP9_COMMON *cm, int mi_offset, + int x_mis, int y_mis, int segment_id) { + int x, y; + + assert(segment_id >= 0 && segment_id < MAX_SEGMENTS); + + for (y = 0; y < y_mis; y++) + for (x = 0; x < x_mis; x++) + cm->current_frame_seg_map[mi_offset + y * cm->mi_cols + x] = segment_id; +} + +static void copy_segment_id(const VP9_COMMON *cm, + const uint8_t *last_segment_ids, + uint8_t *current_segment_ids, + int mi_offset, int x_mis, int y_mis) { + int x, y; + + for (y = 0; y < y_mis; y++) + for (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 read_intra_segment_id(VP9_COMMON *const cm, int mi_offset, + int x_mis, int y_mis, + vpx_reader *r) { + struct segmentation *const seg = &cm->seg; + int segment_id; + + 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 0; + } + + segment_id = read_segment_id(r, seg); + set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id); + return segment_id; +} + +static int read_inter_segment_id(VP9_COMMON *const cm, MACROBLOCKD *const xd, + int mi_row, int mi_col, vpx_reader *r, + int x_mis, int y_mis) { + struct segmentation *const seg = &cm->seg; + MODE_INFO *const mi = xd->mi[0]; + int predicted_segment_id, segment_id; + const int mi_offset = mi_row * cm->mi_cols + mi_col; + + if (!seg->enabled) + return 0; // Default for disabled segmentation + + predicted_segment_id = cm->last_frame_seg_map ? + dec_get_segment_id(cm, cm->last_frame_seg_map, mi_offset, x_mis, y_mis) : + 0; + + 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 predicted_segment_id; + } + + if (seg->temporal_update) { + const vpx_prob pred_prob = vp9_get_pred_prob_seg_id(seg, xd); + mi->seg_id_predicted = vpx_read(r, pred_prob); + segment_id = mi->seg_id_predicted ? predicted_segment_id + : read_segment_id(r, seg); + } else { + segment_id = read_segment_id(r, seg); + } + set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id); + return segment_id; +} + +static int read_skip(VP9_COMMON *cm, const MACROBLOCKD *xd, + int segment_id, vpx_reader *r) { + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) { + return 1; + } else { + const int ctx = vp9_get_skip_context(xd); + const int skip = vpx_read(r, cm->fc->skip_probs[ctx]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->skip[ctx][skip]; + return skip; + } +} + +static void read_intra_frame_mode_info(VP9_COMMON *const cm, + MACROBLOCKD *const xd, + int mi_row, int mi_col, vpx_reader *r, + int x_mis, int y_mis) { + MODE_INFO *const mi = xd->mi[0]; + const MODE_INFO *above_mi = xd->above_mi; + const MODE_INFO *left_mi = xd->left_mi; + const BLOCK_SIZE bsize = mi->sb_type; + int i; + const int mi_offset = mi_row * cm->mi_cols + mi_col; + + mi->segment_id = read_intra_segment_id(cm, mi_offset, x_mis, y_mis, r); + mi->skip = read_skip(cm, xd, mi->segment_id, r); + mi->tx_size = read_tx_size(cm, xd, 1, r); + mi->ref_frame[0] = INTRA_FRAME; + mi->ref_frame[1] = NONE; + + switch (bsize) { + case BLOCK_4X4: + for (i = 0; i < 4; ++i) + mi->bmi[i].as_mode = + read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, i)); + mi->mode = mi->bmi[3].as_mode; + break; + case BLOCK_4X8: + mi->bmi[0].as_mode = mi->bmi[2].as_mode = + read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 0)); + mi->bmi[1].as_mode = mi->bmi[3].as_mode = mi->mode = + read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 1)); + break; + case BLOCK_8X4: + mi->bmi[0].as_mode = mi->bmi[1].as_mode = + read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 0)); + mi->bmi[2].as_mode = mi->bmi[3].as_mode = mi->mode = + read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 2)); + break; + default: + mi->mode = read_intra_mode(r, + get_y_mode_probs(mi, above_mi, left_mi, 0)); + } + + mi->uv_mode = read_intra_mode(r, vp9_kf_uv_mode_prob[mi->mode]); +} + +static int read_mv_component(vpx_reader *r, + const nmv_component *mvcomp, int usehp) { + int mag, d, fr, hp; + const int sign = vpx_read(r, mvcomp->sign); + const int mv_class = vpx_read_tree(r, vp9_mv_class_tree, mvcomp->classes); + const int class0 = mv_class == MV_CLASS_0; + + // Integer part + if (class0) { + d = vpx_read_tree(r, vp9_mv_class0_tree, mvcomp->class0); + mag = 0; + } else { + int i; + const int n = mv_class + CLASS0_BITS - 1; // number of bits + + d = 0; + for (i = 0; i < n; ++i) + d |= vpx_read(r, mvcomp->bits[i]) << i; + mag = CLASS0_SIZE << (mv_class + 2); + } + + // Fractional part + fr = vpx_read_tree(r, vp9_mv_fp_tree, class0 ? mvcomp->class0_fp[d] + : mvcomp->fp); + + // High precision part (if hp is not used, the default value of the hp is 1) + hp = usehp ? vpx_read(r, class0 ? mvcomp->class0_hp : mvcomp->hp) + : 1; + + // Result + mag += ((d << 3) | (fr << 1) | hp) + 1; + return sign ? -mag : mag; +} + +static INLINE void read_mv(vpx_reader *r, MV *mv, const MV *ref, + const nmv_context *ctx, + nmv_context_counts *counts, int allow_hp) { + const MV_JOINT_TYPE joint_type = + (MV_JOINT_TYPE)vpx_read_tree(r, vp9_mv_joint_tree, ctx->joints); + const int use_hp = allow_hp && use_mv_hp(ref); + MV diff = {0, 0}; + + if (mv_joint_vertical(joint_type)) + diff.row = read_mv_component(r, &ctx->comps[0], use_hp); + + if (mv_joint_horizontal(joint_type)) + diff.col = read_mv_component(r, &ctx->comps[1], use_hp); + + vp9_inc_mv(&diff, counts); + + mv->row = ref->row + diff.row; + mv->col = ref->col + diff.col; +} + +static REFERENCE_MODE read_block_reference_mode(VP9_COMMON *cm, + const MACROBLOCKD *xd, + vpx_reader *r) { + if (cm->reference_mode == REFERENCE_MODE_SELECT) { + const int ctx = vp9_get_reference_mode_context(cm, xd); + const REFERENCE_MODE mode = + (REFERENCE_MODE)vpx_read(r, cm->fc->comp_inter_prob[ctx]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->comp_inter[ctx][mode]; + return mode; // SINGLE_REFERENCE or COMPOUND_REFERENCE + } else { + return cm->reference_mode; + } +} + +// Read the referncence frame +static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd, + vpx_reader *r, + int segment_id, MV_REFERENCE_FRAME ref_frame[2]) { + FRAME_CONTEXT *const fc = cm->fc; + FRAME_COUNTS *counts = xd->counts; + + 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; + } else { + const REFERENCE_MODE mode = read_block_reference_mode(cm, xd, r); + // FIXME(rbultje) I'm pretty sure this breaks segmentation ref frame coding + if (mode == COMPOUND_REFERENCE) { + const int idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref]; + const int ctx = vp9_get_pred_context_comp_ref_p(cm, xd); + const int bit = vpx_read(r, fc->comp_ref_prob[ctx]); + if (counts) + ++counts->comp_ref[ctx][bit]; + ref_frame[idx] = cm->comp_fixed_ref; + ref_frame[!idx] = cm->comp_var_ref[bit]; + } else if (mode == SINGLE_REFERENCE) { + const int ctx0 = vp9_get_pred_context_single_ref_p1(xd); + const int bit0 = vpx_read(r, fc->single_ref_prob[ctx0][0]); + if (counts) + ++counts->single_ref[ctx0][0][bit0]; + if (bit0) { + const int ctx1 = vp9_get_pred_context_single_ref_p2(xd); + const int bit1 = vpx_read(r, fc->single_ref_prob[ctx1][1]); + if (counts) + ++counts->single_ref[ctx1][1][bit1]; + ref_frame[0] = bit1 ? ALTREF_FRAME : GOLDEN_FRAME; + } else { + ref_frame[0] = LAST_FRAME; + } + + ref_frame[1] = NONE; + } else { + assert(0 && "Invalid prediction mode."); + } + } +} + +// TODO(slavarnway): Move this decoder version of +// vp9_get_pred_context_switchable_interp() to vp9_pred_common.h and update the +// encoder. +// +// Returns a context number for the given MB prediction signal +static int dec_get_pred_context_switchable_interp(const MACROBLOCKD *xd) { + // Note: + // The mode info data structure has a one element border above and to the + // left of the entries corresponding to real macroblocks. + // The prediction flags in these dummy entries are initialized to 0. + const MODE_INFO *const left_mi = xd->left_mi; + const int left_type = left_mi ? left_mi->interp_filter : SWITCHABLE_FILTERS; + const MODE_INFO *const above_mi = xd->above_mi; + const int above_type = above_mi ? above_mi->interp_filter + : SWITCHABLE_FILTERS; + + if (left_type == above_type) + return left_type; + else if (left_type == SWITCHABLE_FILTERS) + return above_type; + else if (above_type == SWITCHABLE_FILTERS) + return left_type; + else + return SWITCHABLE_FILTERS; +} + +static INLINE INTERP_FILTER read_switchable_interp_filter( + VP9_COMMON *const cm, MACROBLOCKD *const xd, + vpx_reader *r) { + const int ctx = dec_get_pred_context_switchable_interp(xd); + const INTERP_FILTER type = + (INTERP_FILTER)vpx_read_tree(r, vp9_switchable_interp_tree, + cm->fc->switchable_interp_prob[ctx]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->switchable_interp[ctx][type]; + return type; +} + +static void read_intra_block_mode_info(VP9_COMMON *const cm, + MACROBLOCKD *const xd, MODE_INFO *mi, + vpx_reader *r) { + const BLOCK_SIZE bsize = mi->sb_type; + int i; + + switch (bsize) { + case BLOCK_4X4: + for (i = 0; i < 4; ++i) + mi->bmi[i].as_mode = read_intra_mode_y(cm, xd, r, 0); + mi->mode = mi->bmi[3].as_mode; + break; + case BLOCK_4X8: + mi->bmi[0].as_mode = mi->bmi[2].as_mode = read_intra_mode_y(cm, xd, + r, 0); + mi->bmi[1].as_mode = mi->bmi[3].as_mode = mi->mode = + read_intra_mode_y(cm, xd, r, 0); + break; + case BLOCK_8X4: + mi->bmi[0].as_mode = mi->bmi[1].as_mode = read_intra_mode_y(cm, xd, + r, 0); + mi->bmi[2].as_mode = mi->bmi[3].as_mode = mi->mode = + read_intra_mode_y(cm, xd, r, 0); + break; + default: + mi->mode = read_intra_mode_y(cm, xd, r, size_group_lookup[bsize]); + } + + mi->uv_mode = read_intra_mode_uv(cm, xd, r, mi->mode); + + // Initialize interp_filter here so we do not have to check for inter block + // modes in dec_get_pred_context_switchable_interp() + mi->interp_filter = SWITCHABLE_FILTERS; + + mi->ref_frame[0] = INTRA_FRAME; + mi->ref_frame[1] = NONE; +} + +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 void copy_mv_pair(int_mv *dst, const int_mv *src) { + memcpy(dst, src, sizeof(*dst) * 2); +} + +static INLINE void zero_mv_pair(int_mv *dst) { + memset(dst, 0, sizeof(*dst) * 2); +} + +static INLINE int assign_mv(VP9_COMMON *cm, MACROBLOCKD *xd, + PREDICTION_MODE mode, + int_mv mv[2], int_mv ref_mv[2], + int_mv near_nearest_mv[2], + int is_compound, int allow_hp, vpx_reader *r) { + int i; + int ret = 1; + + switch (mode) { + case NEWMV: { + FRAME_COUNTS *counts = xd->counts; + nmv_context_counts *const mv_counts = counts ? &counts->mv : NULL; + for (i = 0; i < 1 + is_compound; ++i) { + read_mv(r, &mv[i].as_mv, &ref_mv[i].as_mv, &cm->fc->nmvc, mv_counts, + allow_hp); + ret = ret && is_mv_valid(&mv[i].as_mv); + } + break; + } + case NEARMV: + case NEARESTMV: { + copy_mv_pair(mv, near_nearest_mv); + break; + } + case ZEROMV: { + zero_mv_pair(mv); + break; + } + default: { + return 0; + } + } + return ret; +} + +static int read_is_inter_block(VP9_COMMON *const cm, MACROBLOCKD *const xd, + int segment_id, vpx_reader *r) { + if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) { + return get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME) != INTRA_FRAME; + } else { + const int ctx = get_intra_inter_context(xd); + const int is_inter = vpx_read(r, cm->fc->intra_inter_prob[ctx]); + FRAME_COUNTS *counts = xd->counts; + if (counts) + ++counts->intra_inter[ctx][is_inter]; + return is_inter; + } +} + +static void dec_find_best_ref_mvs(int allow_hp, int_mv *mvlist, int_mv *best_mv, + int refmv_count) { + int i; + + // Make sure all the candidates are properly clamped etc + for (i = 0; i < refmv_count; ++i) { + lower_mv_precision(&mvlist[i].as_mv, allow_hp); + *best_mv = mvlist[i]; + } +} + +static void fpm_sync(void *const data, int mi_row) { + VP9Decoder *const pbi = (VP9Decoder *)data; + vp9_frameworker_wait(pbi->frame_worker_owner, pbi->common.prev_frame, + mi_row << MI_BLOCK_SIZE_LOG2); +} + +// This macro is used to add a motion vector mv_ref list if it isn't +// already in the list. If it's the second motion vector or early_break +// it will also skip all additional processing and jump to Done! +#define ADD_MV_REF_LIST_EB(mv, refmv_count, mv_ref_list, Done) \ + do { \ + if (refmv_count) { \ + if ((mv).as_int != (mv_ref_list)[0].as_int) { \ + (mv_ref_list)[(refmv_count)] = (mv); \ + refmv_count++; \ + goto Done; \ + } \ + } else { \ + (mv_ref_list)[(refmv_count)++] = (mv); \ + if (early_break) \ + goto Done; \ + } \ + } while (0) + +// If either reference frame is different, not INTRA, and they +// are different from each other scale and add the mv to our list. +#define IF_DIFF_REF_FRAME_ADD_MV_EB(mbmi, ref_frame, ref_sign_bias, \ + refmv_count, mv_ref_list, Done) \ + do { \ + if (is_inter_block(mbmi)) { \ + if ((mbmi)->ref_frame[0] != ref_frame) \ + ADD_MV_REF_LIST_EB(scale_mv((mbmi), 0, ref_frame, ref_sign_bias), \ + refmv_count, mv_ref_list, Done); \ + if (has_second_ref(mbmi) && \ + (mbmi)->ref_frame[1] != ref_frame && \ + (mbmi)->mv[1].as_int != (mbmi)->mv[0].as_int) \ + ADD_MV_REF_LIST_EB(scale_mv((mbmi), 1, ref_frame, ref_sign_bias), \ + refmv_count, mv_ref_list, Done); \ + } \ + } while (0) + +// This function searches the neighborhood of a given MB/SB +// to try and find candidate reference vectors. +static int dec_find_mv_refs(const VP9_COMMON *cm, const MACROBLOCKD *xd, + PREDICTION_MODE mode, MV_REFERENCE_FRAME ref_frame, + const POSITION *const mv_ref_search, + int_mv *mv_ref_list, + int mi_row, int mi_col, int block, int is_sub8x8, + find_mv_refs_sync sync, void *const data) { + const int *ref_sign_bias = cm->ref_frame_sign_bias; + int i, refmv_count = 0; + int different_ref_found = 0; + const MV_REF *const prev_frame_mvs = cm->use_prev_frame_mvs ? + cm->prev_frame->mvs + mi_row * cm->mi_cols + mi_col : NULL; + const TileInfo *const tile = &xd->tile; + // If mode is nearestmv or newmv (uses nearestmv as a reference) then stop + // searching after the first mv is found. + const int early_break = (mode != NEARMV); + + // Blank the reference vector list + memset(mv_ref_list, 0, sizeof(*mv_ref_list) * MAX_MV_REF_CANDIDATES); + + i = 0; + if (is_sub8x8) { + // If the size < 8x8 we get the mv from the bmi substructure for the + // nearest two blocks. + for (i = 0; i < 2; ++i) { + const POSITION *const mv_ref = &mv_ref_search[i]; + if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) { + const MODE_INFO *const candidate_mi = + xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]; + different_ref_found = 1; + + if (candidate_mi->ref_frame[0] == ref_frame) + ADD_MV_REF_LIST_EB( + get_sub_block_mv(candidate_mi, 0, mv_ref->col, block), + refmv_count, mv_ref_list, Done); + else if (candidate_mi->ref_frame[1] == ref_frame) + ADD_MV_REF_LIST_EB( + get_sub_block_mv(candidate_mi, 1, mv_ref->col, block), + refmv_count, mv_ref_list, Done); + } + } + } + + // Check the rest of the neighbors in much the same way + // as before except we don't need to keep track of sub blocks or + // mode counts. + for (; i < MVREF_NEIGHBOURS; ++i) { + const POSITION *const mv_ref = &mv_ref_search[i]; + if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) { + const MODE_INFO *const candidate = + xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]; + different_ref_found = 1; + + if (candidate->ref_frame[0] == ref_frame) + ADD_MV_REF_LIST_EB(candidate->mv[0], refmv_count, mv_ref_list, Done); + else if (candidate->ref_frame[1] == ref_frame) + ADD_MV_REF_LIST_EB(candidate->mv[1], refmv_count, mv_ref_list, Done); + } + } + + // TODO(hkuang): Remove this sync after fixing pthread_cond_broadcast + // on windows platform. The sync here is unnecessary if use_prev_frame_mvs + // is 0. But after removing it, there will be hang in the unit test on windows + // due to several threads waiting for a thread's signal. +#if defined(_WIN32) && !HAVE_PTHREAD_H + if (cm->frame_parallel_decode && sync != NULL) { + sync(data, mi_row); + } +#endif + + // Check the last frame's mode and mv info. + if (prev_frame_mvs) { + // Synchronize here for frame parallel decode if sync function is provided. + if (cm->frame_parallel_decode && sync != NULL) { + sync(data, mi_row); + } + + if (prev_frame_mvs->ref_frame[0] == ref_frame) { + ADD_MV_REF_LIST_EB(prev_frame_mvs->mv[0], refmv_count, mv_ref_list, Done); + } else if (prev_frame_mvs->ref_frame[1] == ref_frame) { + ADD_MV_REF_LIST_EB(prev_frame_mvs->mv[1], refmv_count, mv_ref_list, Done); + } + } + + // Since we couldn't find 2 mvs from the same reference frame + // go back through the neighbors and find motion vectors from + // different reference frames. + if (different_ref_found) { + for (i = 0; i < MVREF_NEIGHBOURS; ++i) { + const POSITION *mv_ref = &mv_ref_search[i]; + if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) { + const MODE_INFO *const candidate = + xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]; + + // If the candidate is INTRA we don't want to consider its mv. + IF_DIFF_REF_FRAME_ADD_MV_EB(candidate, ref_frame, ref_sign_bias, + refmv_count, mv_ref_list, Done); + } + } + } + + // Since we still don't have a candidate we'll try the last frame. + if (prev_frame_mvs) { + if (prev_frame_mvs->ref_frame[0] != ref_frame && + prev_frame_mvs->ref_frame[0] > INTRA_FRAME) { + int_mv mv = prev_frame_mvs->mv[0]; + if (ref_sign_bias[prev_frame_mvs->ref_frame[0]] != + ref_sign_bias[ref_frame]) { + mv.as_mv.row *= -1; + mv.as_mv.col *= -1; + } + ADD_MV_REF_LIST_EB(mv, refmv_count, mv_ref_list, Done); + } + + if (prev_frame_mvs->ref_frame[1] > INTRA_FRAME && + prev_frame_mvs->ref_frame[1] != ref_frame && + prev_frame_mvs->mv[1].as_int != prev_frame_mvs->mv[0].as_int) { + int_mv mv = prev_frame_mvs->mv[1]; + if (ref_sign_bias[prev_frame_mvs->ref_frame[1]] != + ref_sign_bias[ref_frame]) { + mv.as_mv.row *= -1; + mv.as_mv.col *= -1; + } + ADD_MV_REF_LIST_EB(mv, refmv_count, mv_ref_list, Done); + } + } + + if (mode == NEARMV) + refmv_count = MAX_MV_REF_CANDIDATES; + else + // we only care about the nearestmv for the remaining modes + refmv_count = 1; + + Done: + // Clamp vectors + for (i = 0; i < refmv_count; ++i) + clamp_mv_ref(&mv_ref_list[i].as_mv, xd); + + return refmv_count; +} + +static void append_sub8x8_mvs_for_idx(VP9_COMMON *cm, MACROBLOCKD *xd, + const POSITION *const mv_ref_search, + PREDICTION_MODE b_mode, int block, + int ref, int mi_row, int mi_col, + int_mv *best_sub8x8) { + int_mv mv_list[MAX_MV_REF_CANDIDATES]; + MODE_INFO *const mi = xd->mi[0]; + b_mode_info *bmi = mi->bmi; + int n; + int refmv_count; + + assert(MAX_MV_REF_CANDIDATES == 2); + + refmv_count = dec_find_mv_refs(cm, xd, b_mode, mi->ref_frame[ref], + mv_ref_search, mv_list, mi_row, mi_col, block, + 1, NULL, NULL); + + switch (block) { + case 0: + best_sub8x8->as_int = mv_list[refmv_count - 1].as_int; + break; + case 1: + case 2: + if (b_mode == NEARESTMV) { + best_sub8x8->as_int = bmi[0].as_mv[ref].as_int; + } else { + best_sub8x8->as_int = 0; + for (n = 0; n < refmv_count; ++n) + if (bmi[0].as_mv[ref].as_int != mv_list[n].as_int) { + best_sub8x8->as_int = mv_list[n].as_int; + break; + } + } + break; + case 3: + if (b_mode == NEARESTMV) { + best_sub8x8->as_int = bmi[2].as_mv[ref].as_int; + } else { + int_mv candidates[2 + MAX_MV_REF_CANDIDATES]; + candidates[0] = bmi[1].as_mv[ref]; + candidates[1] = bmi[0].as_mv[ref]; + candidates[2] = mv_list[0]; + candidates[3] = mv_list[1]; + best_sub8x8->as_int = 0; + for (n = 0; n < 2 + MAX_MV_REF_CANDIDATES; ++n) + if (bmi[2].as_mv[ref].as_int != candidates[n].as_int) { + best_sub8x8->as_int = candidates[n].as_int; + break; + } + } + break; + default: + assert(0 && "Invalid block index."); + } +} + +static uint8_t get_mode_context(const VP9_COMMON *cm, const MACROBLOCKD *xd, + const POSITION *const mv_ref_search, + int mi_row, int mi_col) { + int i; + int context_counter = 0; + const TileInfo *const tile = &xd->tile; + + // Get mode count from nearest 2 blocks + for (i = 0; i < 2; ++i) { + const POSITION *const mv_ref = &mv_ref_search[i]; + if (is_inside(tile, mi_col, mi_row, cm->mi_rows, mv_ref)) { + const MODE_INFO *const candidate = + xd->mi[mv_ref->col + mv_ref->row * xd->mi_stride]; + // Keep counts for entropy encoding. + context_counter += mode_2_counter[candidate->mode]; + } + } + + return counter_to_context[context_counter]; +} + +static void read_inter_block_mode_info(VP9Decoder *const pbi, + MACROBLOCKD *const xd, + MODE_INFO *const mi, + int mi_row, int mi_col, vpx_reader *r) { + VP9_COMMON *const cm = &pbi->common; + const BLOCK_SIZE bsize = mi->sb_type; + const int allow_hp = cm->allow_high_precision_mv; + int_mv best_ref_mvs[2]; + int ref, is_compound; + uint8_t inter_mode_ctx; + const POSITION *const mv_ref_search = mv_ref_blocks[bsize]; + + read_ref_frames(cm, xd, r, mi->segment_id, mi->ref_frame); + is_compound = has_second_ref(mi); + inter_mode_ctx = get_mode_context(cm, xd, mv_ref_search, mi_row, mi_col); + + if (segfeature_active(&cm->seg, mi->segment_id, SEG_LVL_SKIP)) { + mi->mode = ZEROMV; + if (bsize < BLOCK_8X8) { + vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM, + "Invalid usage of segement feature on small blocks"); + return; + } + } else { + if (bsize >= BLOCK_8X8) + mi->mode = read_inter_mode(cm, xd, r, inter_mode_ctx); + else + // Sub 8x8 blocks use the nearestmv as a ref_mv if the b_mode is NEWMV. + // Setting mode to NEARESTMV forces the search to stop after the nearestmv + // has been found. After b_modes have been read, mode will be overwritten + // by the last b_mode. + mi->mode = NEARESTMV; + + if (mi->mode != ZEROMV) { + for (ref = 0; ref < 1 + is_compound; ++ref) { + int_mv tmp_mvs[MAX_MV_REF_CANDIDATES]; + const MV_REFERENCE_FRAME frame = mi->ref_frame[ref]; + int refmv_count; + + refmv_count = dec_find_mv_refs(cm, xd, mi->mode, frame, mv_ref_search, + tmp_mvs, mi_row, mi_col, -1, 0, + fpm_sync, (void *)pbi); + + dec_find_best_ref_mvs(allow_hp, tmp_mvs, &best_ref_mvs[ref], + refmv_count); + } + } + } + + mi->interp_filter = (cm->interp_filter == SWITCHABLE) + ? read_switchable_interp_filter(cm, xd, r) + : cm->interp_filter; + + if (bsize < BLOCK_8X8) { + const int num_4x4_w = 1 << xd->bmode_blocks_wl; + const int num_4x4_h = 1 << xd->bmode_blocks_hl; + int idx, idy; + PREDICTION_MODE b_mode; + int_mv best_sub8x8[2]; + for (idy = 0; idy < 2; idy += num_4x4_h) { + for (idx = 0; idx < 2; idx += num_4x4_w) { + const int j = idy * 2 + idx; + b_mode = read_inter_mode(cm, xd, r, inter_mode_ctx); + + if (b_mode == NEARESTMV || b_mode == NEARMV) { + for (ref = 0; ref < 1 + is_compound; ++ref) + append_sub8x8_mvs_for_idx(cm, xd, mv_ref_search, b_mode, j, ref, + mi_row, mi_col, &best_sub8x8[ref]); + } + + if (!assign_mv(cm, xd, b_mode, mi->bmi[j].as_mv, best_ref_mvs, + best_sub8x8, is_compound, allow_hp, r)) { + xd->corrupted |= 1; + break; + } + + if (num_4x4_h == 2) + mi->bmi[j + 2] = mi->bmi[j]; + if (num_4x4_w == 2) + mi->bmi[j + 1] = mi->bmi[j]; + } + } + + mi->mode = b_mode; + + copy_mv_pair(mi->mv, mi->bmi[3].as_mv); + } else { + xd->corrupted |= !assign_mv(cm, xd, mi->mode, mi->mv, best_ref_mvs, + best_ref_mvs, is_compound, allow_hp, r); + } +} + +static void read_inter_frame_mode_info(VP9Decoder *const pbi, + MACROBLOCKD *const xd, + int mi_row, int mi_col, vpx_reader *r, + int x_mis, int y_mis) { + VP9_COMMON *const cm = &pbi->common; + MODE_INFO *const mi = xd->mi[0]; + int inter_block; + + mi->segment_id = read_inter_segment_id(cm, xd, mi_row, mi_col, r, x_mis, + y_mis); + mi->skip = read_skip(cm, xd, mi->segment_id, r); + inter_block = read_is_inter_block(cm, xd, mi->segment_id, r); + mi->tx_size = read_tx_size(cm, xd, !mi->skip || !inter_block, r); + + if (inter_block) + read_inter_block_mode_info(pbi, xd, mi, mi_row, mi_col, r); + else + read_intra_block_mode_info(cm, xd, mi, r); +} + +static INLINE void copy_ref_frame_pair(MV_REFERENCE_FRAME *dst, + const MV_REFERENCE_FRAME *src) { + memcpy(dst, src, sizeof(*dst) * 2); +} + +void vp9_read_mode_info(VP9Decoder *const pbi, MACROBLOCKD *xd, + int mi_row, int mi_col, vpx_reader *r, + int x_mis, int y_mis) { + VP9_COMMON *const cm = &pbi->common; + MODE_INFO *const mi = xd->mi[0]; + MV_REF* frame_mvs = cm->cur_frame->mvs + mi_row * cm->mi_cols + mi_col; + int w, h; + + if (frame_is_intra_only(cm)) { + read_intra_frame_mode_info(cm, xd, mi_row, mi_col, r, x_mis, y_mis); + } else { + read_inter_frame_mode_info(pbi, xd, mi_row, mi_col, r, x_mis, y_mis); + + for (h = 0; h < y_mis; ++h) { + for (w = 0; w < x_mis; ++w) { + MV_REF *const mv = frame_mvs + w; + copy_ref_frame_pair(mv->ref_frame, mi->ref_frame); + copy_mv_pair(mv->mv, mi->mv); + } + frame_mvs += cm->mi_cols; + } + } +#if CONFIG_BETTER_HW_COMPATIBILITY && CONFIG_VP9_HIGHBITDEPTH + if ((xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) && + (xd->above_mi == NULL || xd->left_mi == NULL) && + !is_inter_block(mi) && need_top_left[mi->uv_mode]) + assert(0); +#endif // CONFIG_BETTER_HW_COMPATIBILITY && CONFIG_VP9_HIGHBITDEPTH +} |