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vpx/vp9/encoder/vp9_tokenize.c
Jim Bankoski 4b8c6d96ec Tokenization without huge tables. 
Change-Id: Iff528c4b7528cc70320343b3a7ce07a92b024dfd
2014-12-22 08:42:52 -08:00

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/*
* 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 <math.h>
#include <stdio.h>
#include <string.h>
#include "vpx_mem/vpx_mem.h"
#include "vp9/common/vp9_entropy.h"
#include "vp9/common/vp9_pred_common.h"
#include "vp9/common/vp9_seg_common.h"
#include "vp9/encoder/vp9_cost.h"
#include "vp9/encoder/vp9_encoder.h"
#include "vp9/encoder/vp9_tokenize.h"
static int16_t dct_value_cost[DCT_MAX_VALUE * 2];
const int16_t *vp9_dct_value_cost_ptr = dct_value_cost + DCT_MAX_VALUE;
#if CONFIG_VP9_HIGHBITDEPTH
static int16_t dct_value_cost_high10[DCT_MAX_VALUE_HIGH10 * 2];
const int16_t *vp9_dct_value_cost_high10_ptr =
dct_value_cost_high10 + DCT_MAX_VALUE_HIGH10;
static int16_t dct_value_cost_high12[DCT_MAX_VALUE_HIGH12 * 2];
const int16_t *vp9_dct_value_cost_high12_ptr =
dct_value_cost_high12 + DCT_MAX_VALUE_HIGH12;
#endif
static const TOKENVALUE dct_cat_lt_10_value_tokens[] = {
{9, 63}, {9, 61}, {9, 59}, {9, 57}, {9, 55}, {9, 53}, {9, 51}, {9, 49},
{9, 47}, {9, 45}, {9, 43}, {9, 41}, {9, 39}, {9, 37}, {9, 35}, {9, 33},
{9, 31}, {9, 29}, {9, 27}, {9, 25}, {9, 23}, {9, 21}, {9, 19}, {9, 17},
{9, 15}, {9, 13}, {9, 11}, {9, 9}, {9, 7}, {9, 5}, {9, 3}, {9, 1},
{8, 31}, {8, 29}, {8, 27}, {8, 25}, {8, 23}, {8, 21},
{8, 19}, {8, 17}, {8, 15}, {8, 13}, {8, 11}, {8, 9},
{8, 7}, {8, 5}, {8, 3}, {8, 1},
{7, 15}, {7, 13}, {7, 11}, {7, 9}, {7, 7}, {7, 5}, {7, 3}, {7, 1},
{6, 7}, {6, 5}, {6, 3}, {6, 1}, {5, 3}, {5, 1},
{4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 0},
{1, 0}, {2, 0}, {3, 0}, {4, 0},
{5, 0}, {5, 2}, {6, 0}, {6, 2}, {6, 4}, {6, 6},
{7, 0}, {7, 2}, {7, 4}, {7, 6}, {7, 8}, {7, 10}, {7, 12}, {7, 14},
{8, 0}, {8, 2}, {8, 4}, {8, 6}, {8, 8}, {8, 10}, {8, 12},
{8, 14}, {8, 16}, {8, 18}, {8, 20}, {8, 22}, {8, 24},
{8, 26}, {8, 28}, {8, 30}, {9, 0}, {9, 2},
{9, 4}, {9, 6}, {9, 8}, {9, 10}, {9, 12}, {9, 14}, {9, 16},
{9, 18}, {9, 20}, {9, 22}, {9, 24}, {9, 26}, {9, 28},
{9, 30}, {9, 32}, {9, 34}, {9, 36}, {9, 38}, {9, 40},
{9, 42}, {9, 44}, {9, 46}, {9, 48}, {9, 50}, {9, 52},
{9, 54}, {9, 56}, {9, 58}, {9, 60}, {9, 62}
};
const TOKENVALUE *vp9_dct_cat_lt_10_value_tokens = dct_cat_lt_10_value_tokens +
(sizeof(dct_cat_lt_10_value_tokens) / sizeof(*dct_cat_lt_10_value_tokens))
/ 2;
// Array indices are identical to previously-existing CONTEXT_NODE indices
const vp9_tree_index vp9_coef_tree[TREE_SIZE(ENTROPY_TOKENS)] = {
-EOB_TOKEN, 2, // 0 = EOB
-ZERO_TOKEN, 4, // 1 = ZERO
-ONE_TOKEN, 6, // 2 = ONE
8, 12, // 3 = LOW_VAL
-TWO_TOKEN, 10, // 4 = TWO
-THREE_TOKEN, -FOUR_TOKEN, // 5 = THREE
14, 16, // 6 = HIGH_LOW
-CATEGORY1_TOKEN, -CATEGORY2_TOKEN, // 7 = CAT_ONE
18, 20, // 8 = CAT_THREEFOUR
-CATEGORY3_TOKEN, -CATEGORY4_TOKEN, // 9 = CAT_THREE
-CATEGORY5_TOKEN, -CATEGORY6_TOKEN // 10 = CAT_FIVE
};
// Unconstrained Node Tree
const vp9_tree_index vp9_coef_con_tree[TREE_SIZE(ENTROPY_TOKENS)] = {
2, 6, // 0 = LOW_VAL
-TWO_TOKEN, 4, // 1 = TWO
-THREE_TOKEN, -FOUR_TOKEN, // 2 = THREE
8, 10, // 3 = HIGH_LOW
-CATEGORY1_TOKEN, -CATEGORY2_TOKEN, // 4 = CAT_ONE
12, 14, // 5 = CAT_THREEFOUR
-CATEGORY3_TOKEN, -CATEGORY4_TOKEN, // 6 = CAT_THREE
-CATEGORY5_TOKEN, -CATEGORY6_TOKEN // 7 = CAT_FIVE
};
static vp9_tree_index cat1[2], cat2[4], cat3[6], cat4[8], cat5[10], cat6[28];
#if CONFIG_VP9_HIGHBITDEPTH
static vp9_tree_index cat1_high10[2];
static vp9_tree_index cat2_high10[4];
static vp9_tree_index cat3_high10[6];
static vp9_tree_index cat4_high10[8];
static vp9_tree_index cat5_high10[10];
static vp9_tree_index cat6_high10[32];
static vp9_tree_index cat1_high12[2];
static vp9_tree_index cat2_high12[4];
static vp9_tree_index cat3_high12[6];
static vp9_tree_index cat4_high12[8];
static vp9_tree_index cat5_high12[10];
static vp9_tree_index cat6_high12[36];
#endif
static void init_bit_tree(vp9_tree_index *p, int n) {
int i = 0;
while (++i < n) {
p[0] = p[1] = i << 1;
p += 2;
}
p[0] = p[1] = 0;
}
static void init_bit_trees() {
init_bit_tree(cat1, 1);
init_bit_tree(cat2, 2);
init_bit_tree(cat3, 3);
init_bit_tree(cat4, 4);
init_bit_tree(cat5, 5);
init_bit_tree(cat6, 14);
#if CONFIG_VP9_HIGHBITDEPTH
init_bit_tree(cat1_high10, 1);
init_bit_tree(cat2_high10, 2);
init_bit_tree(cat3_high10, 3);
init_bit_tree(cat4_high10, 4);
init_bit_tree(cat5_high10, 5);
init_bit_tree(cat6_high10, 16);
init_bit_tree(cat1_high12, 1);
init_bit_tree(cat2_high12, 2);
init_bit_tree(cat3_high12, 3);
init_bit_tree(cat4_high12, 4);
init_bit_tree(cat5_high12, 5);
init_bit_tree(cat6_high12, 18);
#endif
}
const vp9_extra_bit vp9_extra_bits[ENTROPY_TOKENS] = {
{0, 0, 0, 0}, // ZERO_TOKEN
{0, 0, 0, 1}, // ONE_TOKEN
{0, 0, 0, 2}, // TWO_TOKEN
{0, 0, 0, 3}, // THREE_TOKEN
{0, 0, 0, 4}, // FOUR_TOKEN
{cat1, vp9_cat1_prob, 1, CAT1_MIN_VAL}, // CATEGORY1_TOKEN
{cat2, vp9_cat2_prob, 2, CAT2_MIN_VAL}, // CATEGORY2_TOKEN
{cat3, vp9_cat3_prob, 3, CAT3_MIN_VAL}, // CATEGORY3_TOKEN
{cat4, vp9_cat4_prob, 4, CAT4_MIN_VAL}, // CATEGORY4_TOKEN
{cat5, vp9_cat5_prob, 5, CAT5_MIN_VAL}, // CATEGORY5_TOKEN
{cat6, vp9_cat6_prob, 14, CAT6_MIN_VAL}, // CATEGORY6_TOKEN
{0, 0, 0, 0} // EOB_TOKEN
};
#if CONFIG_VP9_HIGHBITDEPTH
const vp9_extra_bit vp9_extra_bits_high10[ENTROPY_TOKENS] = {
{0, 0, 0, 0}, // ZERO_TOKEN
{0, 0, 0, 1}, // ONE_TOKEN
{0, 0, 0, 2}, // TWO_TOKEN
{0, 0, 0, 3}, // THREE_TOKEN
{0, 0, 0, 4}, // FOUR_TOKEN
{cat1_high10, vp9_cat1_prob_high10, 1, CAT1_MIN_VAL}, // CATEGORY1_TOKEN
{cat2_high10, vp9_cat2_prob_high10, 2, CAT2_MIN_VAL}, // CATEGORY2_TOKEN
{cat3_high10, vp9_cat3_prob_high10, 3, CAT3_MIN_VAL}, // CATEGORY3_TOKEN
{cat4_high10, vp9_cat4_prob_high10, 4, CAT4_MIN_VAL}, // CATEGORY4_TOKEN
{cat5_high10, vp9_cat5_prob_high10, 5, CAT5_MIN_VAL}, // CATEGORY5_TOKEN
{cat6_high10, vp9_cat6_prob_high10, 16, CAT6_MIN_VAL}, // CATEGORY6_TOKEN
{0, 0, 0, 0} // EOB_TOKEN
};
const vp9_extra_bit vp9_extra_bits_high12[ENTROPY_TOKENS] = {
{0, 0, 0, 0}, // ZERO_TOKEN
{0, 0, 0, 1}, // ONE_TOKEN
{0, 0, 0, 2}, // TWO_TOKEN
{0, 0, 0, 3}, // THREE_TOKEN
{0, 0, 0, 4}, // FOUR_TOKEN
{cat1_high12, vp9_cat1_prob_high12, 1, CAT1_MIN_VAL}, // CATEGORY1_TOKEN
{cat2_high12, vp9_cat2_prob_high12, 2, CAT2_MIN_VAL}, // CATEGORY2_TOKEN
{cat3_high12, vp9_cat3_prob_high12, 3, CAT3_MIN_VAL}, // CATEGORY3_TOKEN
{cat4_high12, vp9_cat4_prob_high12, 4, CAT4_MIN_VAL}, // CATEGORY4_TOKEN
{cat5_high12, vp9_cat5_prob_high12, 5, CAT5_MIN_VAL}, // CATEGORY5_TOKEN
{cat6_high12, vp9_cat6_prob_high12, 18, CAT6_MIN_VAL}, // CATEGORY6_TOKEN
{0, 0, 0, 0} // EOB_TOKEN
};
#endif
struct vp9_token vp9_coef_encodings[ENTROPY_TOKENS];
void vp9_coef_tree_initialize() {
init_bit_trees();
vp9_tokens_from_tree(vp9_coef_encodings, vp9_coef_tree);
}
static void tokenize_init_one(const vp9_extra_bit *const e,
int16_t *value_cost, int max_value) {
int i = -max_value;
TOKENVALUE t;
do {
vp9_get_token_extra(i, &t.token, &t.extra);
// initialize the cost for extra bits for all possible coefficient value.
{
int cost = 0;
const vp9_extra_bit *p = &e[t.token];
if (p->base_val) {
const int extra = t.extra;
const int length = p->len;
if (length)
cost += treed_cost(p->tree, p->prob, extra >> 1, length);
cost += vp9_cost_bit(vp9_prob_half, extra & 1); /* sign */
value_cost[i] = cost;
}
}
} while (++i < max_value);
}
void vp9_tokenize_initialize() {
tokenize_init_one(vp9_extra_bits,
dct_value_cost + DCT_MAX_VALUE, DCT_MAX_VALUE);
#if CONFIG_VP9_HIGHBITDEPTH
tokenize_init_one(vp9_extra_bits_high10,
dct_value_cost_high10 + DCT_MAX_VALUE_HIGH10,
DCT_MAX_VALUE_HIGH10);
tokenize_init_one(vp9_extra_bits_high12,
dct_value_cost_high12 + DCT_MAX_VALUE_HIGH12,
DCT_MAX_VALUE_HIGH12);
#endif
}
struct tokenize_b_args {
VP9_COMP *cpi;
ThreadData *td;
TOKENEXTRA **tp;
};
static void set_entropy_context_b(int plane, int block, BLOCK_SIZE plane_bsize,
TX_SIZE tx_size, void *arg) {
struct tokenize_b_args* const args = arg;
ThreadData *const td = args->td;
MACROBLOCK *const x = &td->mb;
MACROBLOCKD *const xd = &x->e_mbd;
struct macroblock_plane *p = &x->plane[plane];
struct macroblockd_plane *pd = &xd->plane[plane];
int aoff, loff;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff);
vp9_set_contexts(xd, pd, plane_bsize, tx_size, p->eobs[block] > 0,
aoff, loff);
}
static INLINE void add_token(TOKENEXTRA **t, const vp9_prob *context_tree,
int32_t extra, uint8_t token,
uint8_t skip_eob_node,
unsigned int *counts) {
(*t)->token = token;
(*t)->extra = extra;
(*t)->context_tree = context_tree;
(*t)->skip_eob_node = skip_eob_node;
(*t)++;
++counts[token];
}
static INLINE void add_token_no_extra(TOKENEXTRA **t,
const vp9_prob *context_tree,
uint8_t token,
uint8_t skip_eob_node,
unsigned int *counts) {
(*t)->token = token;
(*t)->context_tree = context_tree;
(*t)->skip_eob_node = skip_eob_node;
(*t)++;
++counts[token];
}
static INLINE int get_tx_eob(const struct segmentation *seg, int segment_id,
TX_SIZE tx_size) {
const int eob_max = 16 << (tx_size << 1);
return vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
}
static void tokenize_b(int plane, int block, BLOCK_SIZE plane_bsize,
TX_SIZE tx_size, void *arg) {
struct tokenize_b_args* const args = arg;
VP9_COMP *cpi = args->cpi;
ThreadData *const td = args->td;
MACROBLOCK *const x = &td->mb;
MACROBLOCKD *const xd = &x->e_mbd;
TOKENEXTRA **tp = args->tp;
uint8_t token_cache[32 * 32];
struct macroblock_plane *p = &x->plane[plane];
struct macroblockd_plane *pd = &xd->plane[plane];
MB_MODE_INFO *mbmi = &xd->mi[0].src_mi->mbmi;
int pt; /* near block/prev token context index */
int c;
TOKENEXTRA *t = *tp; /* store tokens starting here */
int eob = p->eobs[block];
const PLANE_TYPE type = pd->plane_type;
const tran_low_t *qcoeff = BLOCK_OFFSET(p->qcoeff, block);
const int segment_id = mbmi->segment_id;
const int16_t *scan, *nb;
const scan_order *so;
const int ref = is_inter_block(mbmi);
unsigned int (*const counts)[COEFF_CONTEXTS][ENTROPY_TOKENS] =
td->rd_counts.coef_counts[tx_size][type][ref];
vp9_prob (*const coef_probs)[COEFF_CONTEXTS][UNCONSTRAINED_NODES] =
cpi->common.fc->coef_probs[tx_size][type][ref];
unsigned int (*const eob_branch)[COEFF_CONTEXTS] =
td->counts->eob_branch[tx_size][type][ref];
const uint8_t *const band = get_band_translate(tx_size);
const int seg_eob = get_tx_eob(&cpi->common.seg, segment_id, tx_size);
int16_t token;
EXTRABIT extra;
int aoff, loff;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff);
pt = get_entropy_context(tx_size, pd->above_context + aoff,
pd->left_context + loff);
so = get_scan(xd, tx_size, type, block);
scan = so->scan;
nb = so->neighbors;
c = 0;
while (c < eob) {
int v = 0;
int skip_eob = 0;
v = qcoeff[scan[c]];
while (!v) {
add_token_no_extra(&t, coef_probs[band[c]][pt], ZERO_TOKEN, skip_eob,
counts[band[c]][pt]);
eob_branch[band[c]][pt] += !skip_eob;
skip_eob = 1;
token_cache[scan[c]] = 0;
++c;
pt = get_coef_context(nb, token_cache, c);
v = qcoeff[scan[c]];
}
vp9_get_token_extra(v, &token, &extra);
add_token(&t, coef_probs[band[c]][pt], extra, (uint8_t)token,
(uint8_t)skip_eob, counts[band[c]][pt]);
eob_branch[band[c]][pt] += !skip_eob;
token_cache[scan[c]] = vp9_pt_energy_class[token];
++c;
pt = get_coef_context(nb, token_cache, c);
}
if (c < seg_eob) {
add_token_no_extra(&t, coef_probs[band[c]][pt], EOB_TOKEN, 0,
counts[band[c]][pt]);
++eob_branch[band[c]][pt];
}
*tp = t;
vp9_set_contexts(xd, pd, plane_bsize, tx_size, c > 0, aoff, loff);
}
struct is_skippable_args {
MACROBLOCK *x;
int *skippable;
};
static void is_skippable(int plane, int block,
BLOCK_SIZE plane_bsize, TX_SIZE tx_size,
void *argv) {
struct is_skippable_args *args = argv;
(void)plane_bsize;
(void)tx_size;
args->skippable[0] &= (!args->x->plane[plane].eobs[block]);
}
// TODO(yaowu): rewrite and optimize this function to remove the usage of
// vp9_foreach_transform_block() and simplify is_skippable().
int vp9_is_skippable_in_plane(MACROBLOCK *x, BLOCK_SIZE bsize, int plane) {
int result = 1;
struct is_skippable_args args = {x, &result};
vp9_foreach_transformed_block_in_plane(&x->e_mbd, bsize, plane, is_skippable,
&args);
return result;
}
static void has_high_freq_coeff(int plane, int block,
BLOCK_SIZE plane_bsize, TX_SIZE tx_size,
void *argv) {
struct is_skippable_args *args = argv;
int eobs = (tx_size == TX_4X4) ? 3 : 10;
(void) plane_bsize;
*(args->skippable) |= (args->x->plane[plane].eobs[block] > eobs);
}
int vp9_has_high_freq_in_plane(MACROBLOCK *x, BLOCK_SIZE bsize, int plane) {
int result = 0;
struct is_skippable_args args = {x, &result};
vp9_foreach_transformed_block_in_plane(&x->e_mbd, bsize, plane,
has_high_freq_coeff, &args);
return result;
}
void vp9_tokenize_sb(VP9_COMP *cpi, ThreadData *td, TOKENEXTRA **t,
int dry_run, BLOCK_SIZE bsize) {
VP9_COMMON *const cm = &cpi->common;
MACROBLOCK *const x = &td->mb;
MACROBLOCKD *const xd = &x->e_mbd;
MB_MODE_INFO *const mbmi = &xd->mi[0].src_mi->mbmi;
TOKENEXTRA *t_backup = *t;
const int ctx = vp9_get_skip_context(xd);
const int skip_inc = !vp9_segfeature_active(&cm->seg, mbmi->segment_id,
SEG_LVL_SKIP);
struct tokenize_b_args arg = {cpi, td, t};
if (mbmi->skip) {
if (!dry_run)
td->counts->skip[ctx][1] += skip_inc;
reset_skip_context(xd, bsize);
if (dry_run)
*t = t_backup;
return;
}
if (!dry_run) {
td->counts->skip[ctx][0] += skip_inc;
vp9_foreach_transformed_block(xd, bsize, tokenize_b, &arg);
} else {
vp9_foreach_transformed_block(xd, bsize, set_entropy_context_b, &arg);
*t = t_backup;
}
}
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