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Dmitry Kovalev authored
Extracting get_scan_and_band function from get_entropy_context to remove duplicated code. Change-Id: I5da1f5a60263017e887da68bc834317b5f084cb2
a23c2a9e
/* * 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 "vpx_mem/vpx_mem.h"#include "vpx_ports/mem.h"#include "vp9/common/vp9_blockd.h"#include "vp9/common/vp9_common.h"#include "vp9/common/vp9_seg_common.h"#include "vp9/decoder/vp9_dboolhuff.h"#include "vp9/decoder/vp9_detokenize.h"#include "vp9/decoder/vp9_onyxd_int.h"#include "vp9/decoder/vp9_treereader.h"#define EOB_CONTEXT_NODE 0#define ZERO_CONTEXT_NODE 1#define ONE_CONTEXT_NODE 2#define LOW_VAL_CONTEXT_NODE 3#define TWO_CONTEXT_NODE 4#define THREE_CONTEXT_NODE 5#define HIGH_LOW_CONTEXT_NODE 6#define CAT_ONE_CONTEXT_NODE 7#define CAT_THREEFOUR_CONTEXT_NODE 8#define CAT_THREE_CONTEXT_NODE 9#define CAT_FIVE_CONTEXT_NODE 10#define CAT1_MIN_VAL 5#define CAT2_MIN_VAL 7#define CAT3_MIN_VAL 11#define CAT4_MIN_VAL 19#define CAT5_MIN_VAL 35#define CAT6_MIN_VAL 67#define CAT1_PROB0 159#define CAT2_PROB0 145#define CAT2_PROB1 165#define CAT3_PROB0 140#define CAT3_PROB1 148#define CAT3_PROB2 173#define CAT4_PROB0 135#define CAT4_PROB1 140#define CAT4_PROB2 155#define CAT4_PROB3 176#define CAT5_PROB0 130#define CAT5_PROB1 134#define CAT5_PROB2 141#define CAT5_PROB3 157#define CAT5_PROB4 180static const vp9_prob cat6_prob[15] = { 254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0};DECLARE_ALIGNED(16, extern const uint8_t, vp9_pt_energy_class[MAX_ENTROPY_TOKENS]);#define INCREMENT_COUNT(token) \ do { \ coef_counts[type][ref][band][pt] \ [token >= TWO_TOKEN ? \ (token == DCT_EOB_TOKEN ? DCT_EOB_MODEL_TOKEN : TWO_TOKEN) : \7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
token]++; \
token_cache[scan[c]] = vp9_pt_energy_class[token]; \
} while (0)
#define WRITE_COEF_CONTINUE(val, token) \
{ \
qcoeff_ptr[scan[c]] = vp9_read_and_apply_sign(r, val) * \
dq[c > 0] / (1 + (tx_size == TX_32X32)); \
INCREMENT_COUNT(token); \
c++; \
continue; \
}
#define ADJUST_COEF(prob, bits_count) \
do { \
if (vp9_read(r, prob)) \
val += 1 << bits_count; \
} while (0);
static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
vp9_reader *r, int block_idx,
PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr,
TX_SIZE tx_size, const int16_t *dq,
ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L) {
FRAME_CONTEXT *const fc = &cm->fc;
FRAME_COUNTS *const counts = &cm->counts;
const int ref = is_inter_block(&xd->this_mi->mbmi);
int band, c = 0;
vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] =
fc->coef_probs[tx_size][type][ref];
vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES];
uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } };
vp9_prob *prob;
vp9_coeff_count_model *coef_counts = counts->coef[tx_size];
const int16_t *scan, *nb;
const uint8_t *band_translate;
uint8_t token_cache[1024];
int pt = get_entropy_context(tx_size, A, L);
get_scan_and_band(xd, tx_size, type, block_idx, &scan, &band_translate);
nb = vp9_get_coef_neighbors_handle(scan);
while (1) {
int val;
const uint8_t *cat6 = cat6_prob;
if (c >= seg_eob)
break;
if (c)
pt = get_coef_context(nb, token_cache, c);
band = get_coef_band(band_translate, c);
prob = coef_probs[band][pt];
counts->eob_branch[tx_size][type][ref][band][pt]++;
if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
break;
SKIP_START:
if (c >= seg_eob)
break;
if (c)
pt = get_coef_context(nb, token_cache, c);
band = get_coef_band(band_translate, c);
prob = coef_probs[band][pt];
if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) {
INCREMENT_COUNT(ZERO_TOKEN);
++c;
goto SKIP_START;
}
// ONE_CONTEXT_NODE_0_
if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) {
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WRITE_COEF_CONTINUE(1, ONE_TOKEN);
}
// Load full probabilities if not already loaded
if (!load_map[band][pt]) {
vp9_model_to_full_probs(coef_probs[band][pt],
coef_probs_full[band][pt]);
load_map[band][pt] = 1;
}
prob = coef_probs_full[band][pt];
// LOW_VAL_CONTEXT_NODE_0_
if (!vp9_read(r, prob[LOW_VAL_CONTEXT_NODE])) {
if (!vp9_read(r, prob[TWO_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(2, TWO_TOKEN);
}
if (!vp9_read(r, prob[THREE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(3, THREE_TOKEN);
}
WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
}
// HIGH_LOW_CONTEXT_NODE_0_
if (!vp9_read(r, prob[HIGH_LOW_CONTEXT_NODE])) {
if (!vp9_read(r, prob[CAT_ONE_CONTEXT_NODE])) {
val = CAT1_MIN_VAL;
ADJUST_COEF(CAT1_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
}
val = CAT2_MIN_VAL;
ADJUST_COEF(CAT2_PROB1, 1);
ADJUST_COEF(CAT2_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
}
// CAT_THREEFOUR_CONTEXT_NODE_0_
if (!vp9_read(r, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
if (!vp9_read(r, prob[CAT_THREE_CONTEXT_NODE])) {
val = CAT3_MIN_VAL;
ADJUST_COEF(CAT3_PROB2, 2);
ADJUST_COEF(CAT3_PROB1, 1);
ADJUST_COEF(CAT3_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3);
}
val = CAT4_MIN_VAL;
ADJUST_COEF(CAT4_PROB3, 3);
ADJUST_COEF(CAT4_PROB2, 2);
ADJUST_COEF(CAT4_PROB1, 1);
ADJUST_COEF(CAT4_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4);
}
// CAT_FIVE_CONTEXT_NODE_0_:
if (!vp9_read(r, prob[CAT_FIVE_CONTEXT_NODE])) {
val = CAT5_MIN_VAL;
ADJUST_COEF(CAT5_PROB4, 4);
ADJUST_COEF(CAT5_PROB3, 3);
ADJUST_COEF(CAT5_PROB2, 2);
ADJUST_COEF(CAT5_PROB1, 1);
ADJUST_COEF(CAT5_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5);
}
val = 0;
while (*cat6) {
val = (val << 1) | vp9_read(r, *cat6++);
}
val += CAT6_MIN_VAL;
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
}
if (c < seg_eob)
coef_counts[type][ref][band][pt][DCT_EOB_MODEL_TOKEN]++;
return c;
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}
struct decode_block_args {
VP9D_COMP *pbi;
vp9_reader *r;
int *eobtotal;
};
static void decode_block(int plane, int block, BLOCK_SIZE plane_bsize,
TX_SIZE tx_size, void *argv) {
const struct decode_block_args* const arg = argv;
// find the maximum eob for this transform size, adjusted by segment
MACROBLOCKD *xd = &arg->pbi->mb;
struct segmentation *seg = &arg->pbi->common.seg;
struct macroblockd_plane* pd = &xd->plane[plane];
const int segment_id = xd->this_mi->mbmi.segment_id;
const int seg_eob = get_tx_eob(seg, segment_id, tx_size);
int aoff, loff, eob;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff);
eob = decode_coefs(&arg->pbi->common, xd, arg->r, block,
pd->plane_type, seg_eob, BLOCK_OFFSET(pd->qcoeff, block),
tx_size, pd->dequant,
pd->above_context + aoff, pd->left_context + loff);
set_contexts(xd, pd, plane_bsize, tx_size, eob > 0, aoff, loff);
pd->eobs[block] = eob;
*arg->eobtotal += eob;
}
int vp9_decode_tokens(VP9D_COMP *pbi, vp9_reader *r, BLOCK_SIZE bsize) {
int eobtotal = 0;
struct decode_block_args args = {pbi, r, &eobtotal};
foreach_transformed_block(&pbi->mb, bsize, decode_block, &args);
return eobtotal;
}