542 lines
19 KiB
C
542 lines
19 KiB
C
/*
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Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_entropy.h"
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#include "vp9/common/vp9_entropymode.h"
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#include "vp9/common/vp9_entropymv.h"
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#include "vp9/common/vp9_mvref_common.h"
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#include "vp9/common/vp9_pred_common.h"
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#include "vp9/common/vp9_reconinter.h"
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#include "vp9/common/vp9_seg_common.h"
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#include "vp9/decoder/vp9_decodemv.h"
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#include "vp9/decoder/vp9_decodeframe.h"
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#include "vp9/decoder/vp9_onyxd_int.h"
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#include "vp9/decoder/vp9_reader.h"
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static MB_PREDICTION_MODE read_intra_mode(vp9_reader *r, const vp9_prob *p) {
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return (MB_PREDICTION_MODE)vp9_read_tree(r, vp9_intra_mode_tree, p);
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}
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static MB_PREDICTION_MODE read_intra_mode_y(VP9_COMMON *cm, vp9_reader *r,
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int size_group) {
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const MB_PREDICTION_MODE y_mode = read_intra_mode(r,
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cm->fc.y_mode_prob[size_group]);
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if (!cm->frame_parallel_decoding_mode)
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++cm->counts.y_mode[size_group][y_mode];
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return y_mode;
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}
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static MB_PREDICTION_MODE read_intra_mode_uv(VP9_COMMON *cm, vp9_reader *r,
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MB_PREDICTION_MODE y_mode) {
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const MB_PREDICTION_MODE uv_mode = read_intra_mode(r,
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cm->fc.uv_mode_prob[y_mode]);
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if (!cm->frame_parallel_decoding_mode)
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++cm->counts.uv_mode[y_mode][uv_mode];
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return uv_mode;
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}
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static MB_PREDICTION_MODE read_inter_mode(VP9_COMMON *cm, vp9_reader *r,
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int ctx) {
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const int mode = vp9_read_tree(r, vp9_inter_mode_tree,
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cm->fc.inter_mode_probs[ctx]);
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if (!cm->frame_parallel_decoding_mode)
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++cm->counts.inter_mode[ctx][mode];
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return NEARESTMV + mode;
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}
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static int read_segment_id(vp9_reader *r, const struct segmentation *seg) {
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return vp9_read_tree(r, vp9_segment_tree, seg->tree_probs);
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}
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static TX_SIZE read_selected_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd,
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TX_SIZE max_tx_size, vp9_reader *r) {
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const int ctx = vp9_get_tx_size_context(xd);
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const vp9_prob *tx_probs = get_tx_probs(max_tx_size, ctx, &cm->fc.tx_probs);
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TX_SIZE tx_size = vp9_read(r, tx_probs[0]);
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if (tx_size != TX_4X4 && max_tx_size >= TX_16X16) {
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tx_size += vp9_read(r, tx_probs[1]);
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if (tx_size != TX_8X8 && max_tx_size >= TX_32X32)
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tx_size += vp9_read(r, tx_probs[2]);
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}
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if (!cm->frame_parallel_decoding_mode)
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++get_tx_counts(max_tx_size, ctx, &cm->counts.tx)[tx_size];
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return tx_size;
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}
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static TX_SIZE read_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd, TX_MODE tx_mode,
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BLOCK_SIZE bsize, int allow_select, vp9_reader *r) {
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const TX_SIZE max_tx_size = max_txsize_lookup[bsize];
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if (allow_select && tx_mode == TX_MODE_SELECT && bsize >= BLOCK_8X8)
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return read_selected_tx_size(cm, xd, max_tx_size, r);
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else
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return MIN(max_tx_size, tx_mode_to_biggest_tx_size[tx_mode]);
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}
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static void set_segment_id(VP9_COMMON *cm, BLOCK_SIZE bsize,
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int mi_row, int mi_col, int segment_id) {
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const int mi_offset = mi_row * cm->mi_cols + mi_col;
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const int bw = num_8x8_blocks_wide_lookup[bsize];
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const int bh = num_8x8_blocks_high_lookup[bsize];
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const int xmis = MIN(cm->mi_cols - mi_col, bw);
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const int ymis = MIN(cm->mi_rows - mi_row, bh);
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int x, y;
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assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);
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for (y = 0; y < ymis; y++)
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for (x = 0; x < xmis; x++)
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cm->last_frame_seg_map[mi_offset + y * cm->mi_cols + x] = segment_id;
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}
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static int read_intra_segment_id(VP9_COMMON *const cm, MACROBLOCKD *const xd,
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int mi_row, int mi_col,
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vp9_reader *r) {
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struct segmentation *const seg = &cm->seg;
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const BLOCK_SIZE bsize = xd->mi_8x8[0]->mbmi.sb_type;
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int segment_id;
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if (!seg->enabled)
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return 0; // Default for disabled segmentation
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if (!seg->update_map)
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return 0;
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segment_id = read_segment_id(r, seg);
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set_segment_id(cm, bsize, mi_row, mi_col, segment_id);
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return segment_id;
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}
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static int read_inter_segment_id(VP9_COMMON *const cm, MACROBLOCKD *const xd,
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int mi_row, int mi_col, vp9_reader *r) {
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struct segmentation *const seg = &cm->seg;
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MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi;
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const BLOCK_SIZE bsize = mbmi->sb_type;
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int predicted_segment_id, segment_id;
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if (!seg->enabled)
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return 0; // Default for disabled segmentation
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predicted_segment_id = vp9_get_segment_id(cm, cm->last_frame_seg_map,
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bsize, mi_row, mi_col);
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if (!seg->update_map)
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return predicted_segment_id;
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if (seg->temporal_update) {
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const vp9_prob pred_prob = vp9_get_pred_prob_seg_id(seg, xd);
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mbmi->seg_id_predicted = vp9_read(r, pred_prob);
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segment_id = mbmi->seg_id_predicted ? predicted_segment_id
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: read_segment_id(r, seg);
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} else {
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segment_id = read_segment_id(r, seg);
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}
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set_segment_id(cm, bsize, mi_row, mi_col, segment_id);
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return segment_id;
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}
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static int read_skip(VP9_COMMON *cm, const MACROBLOCKD *xd,
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int segment_id, vp9_reader *r) {
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if (vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) {
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return 1;
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} else {
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const int ctx = vp9_get_skip_context(xd);
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const int skip = vp9_read(r, cm->fc.skip_probs[ctx]);
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if (!cm->frame_parallel_decoding_mode)
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++cm->counts.skip[ctx][skip];
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return skip;
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}
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}
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static void read_intra_frame_mode_info(VP9_COMMON *const cm,
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MACROBLOCKD *const xd,
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int mi_row, int mi_col, vp9_reader *r) {
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MODE_INFO *const mi = xd->mi_8x8[0];
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MB_MODE_INFO *const mbmi = &mi->mbmi;
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const MODE_INFO *above_mi = xd->mi_8x8[-cm->mode_info_stride];
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const MODE_INFO *left_mi = xd->left_available ? xd->mi_8x8[-1] : NULL;
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const BLOCK_SIZE bsize = mbmi->sb_type;
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mbmi->segment_id = read_intra_segment_id(cm, xd, mi_row, mi_col, r);
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mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r);
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mbmi->tx_size = read_tx_size(cm, xd, cm->tx_mode, bsize, 1, r);
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mbmi->ref_frame[0] = INTRA_FRAME;
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mbmi->ref_frame[1] = NONE;
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if (bsize >= BLOCK_8X8) {
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const MB_PREDICTION_MODE A = vp9_above_block_mode(mi, above_mi, 0);
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const MB_PREDICTION_MODE L = vp9_left_block_mode(mi, left_mi, 0);
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mbmi->mode = read_intra_mode(r, vp9_kf_y_mode_prob[A][L]);
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} else {
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// Only 4x4, 4x8, 8x4 blocks
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const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize]; // 1 or 2
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const int num_4x4_h = num_4x4_blocks_high_lookup[bsize]; // 1 or 2
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int idx, idy;
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for (idy = 0; idy < 2; idy += num_4x4_h) {
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for (idx = 0; idx < 2; idx += num_4x4_w) {
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const int ib = idy * 2 + idx;
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const MB_PREDICTION_MODE A = vp9_above_block_mode(mi, above_mi, ib);
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const MB_PREDICTION_MODE L = vp9_left_block_mode(mi, left_mi, ib);
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const MB_PREDICTION_MODE b_mode = read_intra_mode(r,
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vp9_kf_y_mode_prob[A][L]);
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mi->bmi[ib].as_mode = b_mode;
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if (num_4x4_h == 2)
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mi->bmi[ib + 2].as_mode = b_mode;
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if (num_4x4_w == 2)
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mi->bmi[ib + 1].as_mode = b_mode;
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}
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}
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mbmi->mode = mi->bmi[3].as_mode;
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}
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mbmi->uv_mode = read_intra_mode(r, vp9_kf_uv_mode_prob[mbmi->mode]);
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}
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static int read_mv_component(vp9_reader *r,
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const nmv_component *mvcomp, int usehp) {
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int mag, d, fr, hp;
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const int sign = vp9_read(r, mvcomp->sign);
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const int mv_class = vp9_read_tree(r, vp9_mv_class_tree, mvcomp->classes);
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const int class0 = mv_class == MV_CLASS_0;
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// Integer part
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if (class0) {
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d = vp9_read_tree(r, vp9_mv_class0_tree, mvcomp->class0);
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} else {
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int i;
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const int n = mv_class + CLASS0_BITS - 1; // number of bits
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d = 0;
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for (i = 0; i < n; ++i)
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d |= vp9_read(r, mvcomp->bits[i]) << i;
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}
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// Fractional part
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fr = vp9_read_tree(r, vp9_mv_fp_tree, class0 ? mvcomp->class0_fp[d]
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: mvcomp->fp);
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// High precision part (if hp is not used, the default value of the hp is 1)
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hp = usehp ? vp9_read(r, class0 ? mvcomp->class0_hp : mvcomp->hp)
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: 1;
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// Result
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mag = vp9_get_mv_mag(mv_class, (d << 3) | (fr << 1) | hp) + 1;
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return sign ? -mag : mag;
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}
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static INLINE void read_mv(vp9_reader *r, MV *mv, const MV *ref,
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const nmv_context *ctx,
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nmv_context_counts *counts, int allow_hp) {
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const MV_JOINT_TYPE j = vp9_read_tree(r, vp9_mv_joint_tree, ctx->joints);
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const int use_hp = allow_hp && vp9_use_mv_hp(ref);
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MV diff = {0, 0};
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if (mv_joint_vertical(j))
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diff.row = read_mv_component(r, &ctx->comps[0], use_hp);
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if (mv_joint_horizontal(j))
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diff.col = read_mv_component(r, &ctx->comps[1], use_hp);
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vp9_inc_mv(&diff, counts);
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mv->row = ref->row + diff.row;
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mv->col = ref->col + diff.col;
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}
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static REFERENCE_MODE read_reference_mode(VP9_COMMON *cm, const MACROBLOCKD *xd,
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vp9_reader *r) {
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const int ctx = vp9_get_reference_mode_context(cm, xd);
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const int mode = vp9_read(r, cm->fc.comp_inter_prob[ctx]);
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if (!cm->frame_parallel_decoding_mode)
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++cm->counts.comp_inter[ctx][mode];
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return mode; // SINGLE_REFERENCE or COMPOUND_REFERENCE
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}
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// Read the referncence frame
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static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
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vp9_reader *r,
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int segment_id, MV_REFERENCE_FRAME ref_frame[2]) {
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FRAME_CONTEXT *const fc = &cm->fc;
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FRAME_COUNTS *const counts = &cm->counts;
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if (vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
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ref_frame[0] = vp9_get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME);
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ref_frame[1] = NONE;
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} else {
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const REFERENCE_MODE mode = (cm->reference_mode == REFERENCE_MODE_SELECT)
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? read_reference_mode(cm, xd, r)
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: cm->reference_mode;
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// FIXME(rbultje) I'm pretty sure this breaks segmentation ref frame coding
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if (mode == COMPOUND_REFERENCE) {
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const int idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
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const int ctx = vp9_get_pred_context_comp_ref_p(cm, xd);
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const int bit = vp9_read(r, fc->comp_ref_prob[ctx]);
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if (!cm->frame_parallel_decoding_mode)
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++counts->comp_ref[ctx][bit];
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ref_frame[idx] = cm->comp_fixed_ref;
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ref_frame[!idx] = cm->comp_var_ref[bit];
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} else if (mode == SINGLE_REFERENCE) {
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const int ctx0 = vp9_get_pred_context_single_ref_p1(xd);
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const int bit0 = vp9_read(r, fc->single_ref_prob[ctx0][0]);
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if (!cm->frame_parallel_decoding_mode)
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++counts->single_ref[ctx0][0][bit0];
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if (bit0) {
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const int ctx1 = vp9_get_pred_context_single_ref_p2(xd);
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const int bit1 = vp9_read(r, fc->single_ref_prob[ctx1][1]);
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if (!cm->frame_parallel_decoding_mode)
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++counts->single_ref[ctx1][1][bit1];
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ref_frame[0] = bit1 ? ALTREF_FRAME : GOLDEN_FRAME;
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} else {
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ref_frame[0] = LAST_FRAME;
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}
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ref_frame[1] = NONE;
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} else {
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assert(0 && "Invalid prediction mode.");
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}
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}
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}
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static INLINE INTERP_FILTER read_switchable_interp_filter(
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VP9_COMMON *const cm, MACROBLOCKD *const xd, vp9_reader *r) {
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const int ctx = vp9_get_pred_context_switchable_interp(xd);
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const int type = vp9_read_tree(r, vp9_switchable_interp_tree,
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cm->fc.switchable_interp_prob[ctx]);
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if (!cm->frame_parallel_decoding_mode)
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++cm->counts.switchable_interp[ctx][type];
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return type;
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}
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static void read_intra_block_mode_info(VP9_COMMON *const cm, MODE_INFO *mi,
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vp9_reader *r) {
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MB_MODE_INFO *const mbmi = &mi->mbmi;
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const BLOCK_SIZE bsize = mi->mbmi.sb_type;
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mbmi->ref_frame[0] = INTRA_FRAME;
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mbmi->ref_frame[1] = NONE;
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if (bsize >= BLOCK_8X8) {
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mbmi->mode = read_intra_mode_y(cm, r, size_group_lookup[bsize]);
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} else {
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// Only 4x4, 4x8, 8x4 blocks
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const int num_4x4_w = num_4x4_blocks_wide_lookup[bsize]; // 1 or 2
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const int num_4x4_h = num_4x4_blocks_high_lookup[bsize]; // 1 or 2
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int idx, idy;
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for (idy = 0; idy < 2; idy += num_4x4_h) {
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for (idx = 0; idx < 2; idx += num_4x4_w) {
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const int ib = idy * 2 + idx;
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const int b_mode = read_intra_mode_y(cm, r, 0);
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mi->bmi[ib].as_mode = b_mode;
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if (num_4x4_h == 2)
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mi->bmi[ib + 2].as_mode = b_mode;
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if (num_4x4_w == 2)
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mi->bmi[ib + 1].as_mode = b_mode;
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}
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}
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mbmi->mode = mi->bmi[3].as_mode;
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}
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mbmi->uv_mode = read_intra_mode_uv(cm, r, mbmi->mode);
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}
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static INLINE int assign_mv(VP9_COMMON *cm, MB_PREDICTION_MODE mode,
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int_mv mv[2], int_mv ref_mv[2],
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int_mv nearest_mv[2], int_mv near_mv[2],
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int is_compound, int allow_hp, vp9_reader *r) {
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int i;
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int ret = 1;
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switch (mode) {
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case NEWMV: {
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nmv_context_counts *const mv_counts = cm->frame_parallel_decoding_mode ?
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NULL : &cm->counts.mv;
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read_mv(r, &mv[0].as_mv, &ref_mv[0].as_mv,
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&cm->fc.nmvc, mv_counts, allow_hp);
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if (is_compound)
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read_mv(r, &mv[1].as_mv, &ref_mv[1].as_mv,
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&cm->fc.nmvc, mv_counts, allow_hp);
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for (i = 0; i < 1 + is_compound; ++i) {
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ret = ret && mv[i].as_mv.row < MV_UPP && mv[i].as_mv.row > MV_LOW;
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ret = ret && mv[i].as_mv.col < MV_UPP && mv[i].as_mv.col > MV_LOW;
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}
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break;
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}
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case NEARESTMV: {
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mv[0].as_int = nearest_mv[0].as_int;
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if (is_compound)
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mv[1].as_int = nearest_mv[1].as_int;
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break;
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}
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case NEARMV: {
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mv[0].as_int = near_mv[0].as_int;
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if (is_compound)
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mv[1].as_int = near_mv[1].as_int;
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break;
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}
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case ZEROMV: {
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mv[0].as_int = 0;
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if (is_compound)
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mv[1].as_int = 0;
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break;
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}
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default: {
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return 0;
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}
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}
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return ret;
|
|
}
|
|
|
|
static int read_is_inter_block(VP9_COMMON *const cm, MACROBLOCKD *const xd,
|
|
int segment_id, vp9_reader *r) {
|
|
if (vp9_segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
|
|
return vp9_get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME) !=
|
|
INTRA_FRAME;
|
|
} else {
|
|
const int ctx = vp9_get_intra_inter_context(xd);
|
|
const int is_inter = vp9_read(r, cm->fc.intra_inter_prob[ctx]);
|
|
if (!cm->frame_parallel_decoding_mode)
|
|
++cm->counts.intra_inter[ctx][is_inter];
|
|
return is_inter;
|
|
}
|
|
}
|
|
|
|
static void read_inter_block_mode_info(VP9_COMMON *const cm,
|
|
MACROBLOCKD *const xd,
|
|
const TileInfo *const tile,
|
|
MODE_INFO *const mi,
|
|
int mi_row, int mi_col, vp9_reader *r) {
|
|
MB_MODE_INFO *const mbmi = &mi->mbmi;
|
|
const BLOCK_SIZE bsize = mbmi->sb_type;
|
|
const int allow_hp = cm->allow_high_precision_mv;
|
|
|
|
int_mv nearestmv[2], nearmv[2];
|
|
int inter_mode_ctx, ref, is_compound;
|
|
|
|
read_ref_frames(cm, xd, r, mbmi->segment_id, mbmi->ref_frame);
|
|
is_compound = has_second_ref(mbmi);
|
|
|
|
for (ref = 0; ref < 1 + is_compound; ++ref) {
|
|
const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
|
|
vp9_find_mv_refs(cm, xd, tile, mi, xd->last_mi, frame, mbmi->ref_mvs[frame],
|
|
mi_row, mi_col);
|
|
}
|
|
|
|
inter_mode_ctx = mbmi->mode_context[mbmi->ref_frame[0]];
|
|
|
|
if (vp9_segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
|
|
mbmi->mode = ZEROMV;
|
|
if (bsize < BLOCK_8X8) {
|
|
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
|
|
"Invalid usage of segement feature on small blocks");
|
|
return;
|
|
}
|
|
} else {
|
|
if (bsize >= BLOCK_8X8)
|
|
mbmi->mode = read_inter_mode(cm, r, inter_mode_ctx);
|
|
}
|
|
|
|
if (bsize < BLOCK_8X8 || mbmi->mode != ZEROMV) {
|
|
for (ref = 0; ref < 1 + is_compound; ++ref) {
|
|
vp9_find_best_ref_mvs(xd, allow_hp, mbmi->ref_mvs[mbmi->ref_frame[ref]],
|
|
&nearestmv[ref], &nearmv[ref]);
|
|
}
|
|
}
|
|
|
|
mbmi->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 = num_4x4_blocks_wide_lookup[bsize]; // 1 or 2
|
|
const int num_4x4_h = num_4x4_blocks_high_lookup[bsize]; // 1 or 2
|
|
int idx, idy;
|
|
int b_mode;
|
|
int_mv nearest_sub8x8[2], near_sub8x8[2];
|
|
for (idy = 0; idy < 2; idy += num_4x4_h) {
|
|
for (idx = 0; idx < 2; idx += num_4x4_w) {
|
|
int_mv block[2];
|
|
const int j = idy * 2 + idx;
|
|
b_mode = read_inter_mode(cm, r, inter_mode_ctx);
|
|
|
|
if (b_mode == NEARESTMV || b_mode == NEARMV)
|
|
for (ref = 0; ref < 1 + is_compound; ++ref)
|
|
vp9_append_sub8x8_mvs_for_idx(cm, xd, tile, j, ref, mi_row, mi_col,
|
|
&nearest_sub8x8[ref],
|
|
&near_sub8x8[ref]);
|
|
|
|
if (!assign_mv(cm, b_mode, block, nearestmv,
|
|
nearest_sub8x8, near_sub8x8,
|
|
is_compound, allow_hp, r)) {
|
|
xd->corrupted |= 1;
|
|
break;
|
|
};
|
|
|
|
mi->bmi[j].as_mv[0].as_int = block[0].as_int;
|
|
if (is_compound)
|
|
mi->bmi[j].as_mv[1].as_int = block[1].as_int;
|
|
|
|
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->mbmi.mode = b_mode;
|
|
|
|
mbmi->mv[0].as_int = mi->bmi[3].as_mv[0].as_int;
|
|
mbmi->mv[1].as_int = mi->bmi[3].as_mv[1].as_int;
|
|
} else {
|
|
xd->corrupted |= !assign_mv(cm, mbmi->mode, mbmi->mv, nearestmv,
|
|
nearestmv, nearmv, is_compound, allow_hp, r);
|
|
}
|
|
}
|
|
|
|
static void read_inter_frame_mode_info(VP9_COMMON *const cm,
|
|
MACROBLOCKD *const xd,
|
|
const TileInfo *const tile,
|
|
int mi_row, int mi_col, vp9_reader *r) {
|
|
MODE_INFO *const mi = xd->mi_8x8[0];
|
|
MB_MODE_INFO *const mbmi = &mi->mbmi;
|
|
int inter_block;
|
|
|
|
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, r);
|
|
mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r);
|
|
inter_block = read_is_inter_block(cm, xd, mbmi->segment_id, r);
|
|
mbmi->tx_size = read_tx_size(cm, xd, cm->tx_mode, mbmi->sb_type,
|
|
!mbmi->skip || !inter_block, r);
|
|
|
|
if (inter_block)
|
|
read_inter_block_mode_info(cm, xd, tile, mi, mi_row, mi_col, r);
|
|
else
|
|
read_intra_block_mode_info(cm, mi, r);
|
|
}
|
|
|
|
void vp9_read_mode_info(VP9_COMMON *cm, MACROBLOCKD *xd,
|
|
const TileInfo *const tile,
|
|
int mi_row, int mi_col, vp9_reader *r) {
|
|
if (frame_is_intra_only(cm))
|
|
read_intra_frame_mode_info(cm, xd, mi_row, mi_col, r);
|
|
else
|
|
read_inter_frame_mode_info(cm, xd, tile, mi_row, mi_col, r);
|
|
}
|